2023 Huawei H12-821_V1.0-ENU Exam Dumps Questions

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March 23, 2023

Huawei certification is a highly valuable and sought-after certification for IT professionals seeking to enhance their knowledge and expertise. H12-821_V1.0-ENU exam is specifically designed to validate the skills required to configure and maintain the HCIP-Datacom platform, which is widely used by businesses around the world. These H12-821_V1.0-ENU exam dumps questions are specifically designed to help you prepare for the exam by testing your knowledge and providing you with valuable insights into the types of questions that you will encounter. Test free Huawei H12-821_V1.0-ENU exam questions below.

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1. Which of the following is correct about IP address planning? (Multiple choice)

The IP address in the same network must be unique, but after the VPN is established, there will be no conflict between the overlapping IP addresses of the local and remote networks

Select continuous address blocks during address planning to facilitate route summary later

There must be a margin for address allocation at each level, so that the continuity required for address summary can be guaranteed when the network scale expands

When planning the IP address, you can set a specific function bit to give a certain meaning to the IP address

2. The following is part of the configuration information of the router Huawei. Which of the description of the configuration information is wrong?

[HUAWEI] ip as-path-filter 2 permit_200_300

[HUAWEI]route-policy test permit node 10

[HUAWE]-route-policy] if-match as-path-filter 2

Define a Route-Policy named test, the node serial number is 10

Set the AS path filter with sequence number 2, allowing routing information to include AS200 and AS300

Node 10 of the Route-Policy references AS path filter 2 and defines an if-match clause

The Route-Policy can only be called in the OSPF process

3. Routing policies support multiple operations on routing attributes. Please match the parameters of the following apply clauses with their functions. (Drag and drop questions)

4. Two level-1 routers in different areas can form a neighbor relationship.

True

False

5. Which of the following BGP path attributes are optional transition attributes? (Multiple choice)

Aggregator

MED

Community

Cluster-List

6. BFD control packets are encapsulated in UDP packets for transmission, so the destination port number of the multi-hop BFD control packets is:

5784

3784

4784

2784

7. The output information of a certain router is shown in the figure, so which one of the following descriptions is correct?

The interface address of the router is 10112.1

The Router ID of the router is 10.012.2

The cost value of the router interface is 1500

The router interface is BDR

8. As shown in the figure, when R2 passes the route of 10.0.1.0/24 to R3, which of the following is the Next_Hop address of the route?

10.0.23.3

10.0.23.2

10.0.12.1

10.0.12.2

9. Which statement about the VRRP protocol version is correct? (Multiple choice)

VRRPv2 only works with IPv4

VRRPv3 only works with IPv6

VRRPv3 does not support authentication

VRRPv2 supports authentication

10. Which of the following description about BGP, OSPF, ISIS is correct?

The BGP neighbor relationship is established based on TCP sessions, and the port number used is 179

ISIS runs based on the IP protocol, using the protocol number 89

BGP runs based on UDP sessions, and the port number used is 179

OSPF runs based on the IP protocol, and the protocol number used is 90

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11. NAC (Network Access Control1) network access control includes three authentication methods. () authentication, MAC authentication and Porta authentication. (If English words are involved, please use uppercase)

12. Regarding the basic concept of link aggregation, which of the following description is wrong?

Link aggregation is a method of bundling a group of physical interfaces together as a logical interface to increase bandwidth and reliability.

Link aggregation follows the IEE802.3ad protocol.

The logical link formed by bundling several physical links together is called a link aggregation group (LAG or Trunk)

Link aggregation only exists on active interfaces

13. Which of the following description about IGMPv3 is wrong?

The control capability of the host is increased, not only the multicast group can be specified, but also the source of the multicast can be specified

Serving the SSM model

Response messages and query messages have different message structures from IGMPv1 and v2 versions

Allow the host to specify to receive certain multicast groups sent by certain networks

14. OSPF routes require various LSAs to maintain. Please match the names and responsibilities of the following LSAs.

15. Which of the following scenarios is not suitable for deploying interface policy routing?

In the scenario where the enterprise network has multiple ISP egresses, different network segments of the intranet access the Internet through different ISP egresses

Modify the next-hop of traffic originating locally

On the core switch, the mutual access traffic between the internal network and the external network is drawn to the bypass AC device

On the core switch, the mutual access traffic between the internal network and the external network is drawn to the side-mounted security detection device

16. Which of the following descriptions about the application of route reflectors in BGP are correct? (Multiple choice)

The route learned by the RR from the non-client IBGP peer is advertised to all clients of this RR

The route learned by the RR from the client is only advertised to all non-clients of this RR

RR advertises the routes learned from EBGP peers to all non-clients and clients

When RR receives the route sent by the peer, it only selects the best route for reflection

17. Which of the following descriptions about the application of RPF in multicast data forwarding is wrong?

The router compares the incoming interface of the packet with the RPF interface of the RPF route. If it is consistent, the RPF check passes, indicating that the source path of the message is correct, and it will be forwarded downstream

In the process of multicast data forwarding, the multicast router will perform RPF check on each received multicast data message through the unicast routing table

When the router receives a multicast message, it first checks the source address of the message, and then selects an optimal route according to the priority of the route source, then the outgoing interface of the route is the RPF interface

If the RPF check fails, it indicates that the source path of the message is wrong, and the message will be discarded in the cloud

18. In IS-IS, DIS is used to create and update pseudo nodes, and is responsible for generating link state protocol data unit LSP of pseudo nodes.

What is the priority of DIS by default?

127

19. As shown in the figure, all the ports recorded in the figure are in the same OSPF domain. If the path from R1 to 10.0.0.1 needs to be R1--->R2--->R3, which of the following can be used item configuration?

Modify the G0/0/1 interface cost value of R1 to 30

Modify the G0/0/0 interface cost value of R3 to 1

Modify the G0/0/1 interface cost value of R3 to 22

Modify the G0/0/2 interface cost value of R2 to 20

Modify the cost value of the G0/0/0 interface of R1 to 0

No need to make any changes

20. Which of the following attributes may not be included in the Update message of a BGP route? (Multiple choice)

AS_Path

Local_Preference

0rigin

MED

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21. As shown in the figure, RTA, RTB , RTC , and RTD are in the same AS and establish IBGP neighbor relationships through direct links . RTB and RTC are route reflectors, and RTA and RTC are route reflector clients of RTB. RTB and RTD are the route reflector clients of RTC. RTA announces 10.1.1.0/24 into BGP, and the BGP route received on RTD updates its Originator ID value to ()

22. In a complex network environment, using an unstructured network troubleshooting process may lead to new faults, making network troubleshooting more difficult.

True

False

23. Which of the following are issues that need to be addressed during the planning phase? (Multiple choice)

Determining the technical solution

Understand the project background

Determine project requirements

24. Which of the following statements about the BFD detection mode is correct? (Multiple choice)

Asynchronous mode is a commonly used BFD detection mode

In query mode, once the BFD session is established, the system will no longer send BFD control packets periodically

Asynchronous detection mode does not support echo function

In asynchronous mode, the systems will send BFD control packets according to the negotiated period. If a system does not receive the BFD control packet from the peer within the detection time, it will declare the status of the BFD session as Down.

25. What parameters can the DHCPV6 server assign to the DHCPv6 client? (Multiple choice)

STP server address

DNS server address

Gateway address

IPv6 address prefixes

26. Which of the following OSPF areas can only reach other areas through the default route?

Backbone area

totally stub area

NSSA

Non-backbone area

27. As shown in the figure, in the network running the RSTP protocol, the original root port of SWC fails and the port is in the Down state. At this time, which of the following processes will the network go through to achieve stability?

The standby port on the SWC becomes the new root port and enters the Forwarding state after going through the Learning state

SWC re-elects the root port and directly enters the Forwarding state

The standby port on the SWC becomes the new root port and directly enters the Forwarding state

SWC re-elects the root port and enters the Forwarding state after Learning

28. Which of the following role of the switch in the stacking system is not included?

Main switch

Candidate switch

From the switch

Backup switch

29. Which routes in the following options meet the following ACL conditions? (Multiple choice)

[HUAWEI] acl number 2001

[HUAWEI-acl-basic- 2001] rule 0 permit source 10.1.1.0 0.0.254.255

10.1.2.1/32

10.1.3.1/32

10.1.1.1/32

10.1.4.1/32

30. OSPF runs directly on top of the TCP protocol, using TCP port number 179.

True

False

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31. A BGP neighbor is a neighbor relationship established through UDP.

True

False

32. Regarding multicast MAC addresses, which of the following statements are incorrect? (Multiple choice)

1 multicast MAC address correctly corresponds to 32 IP multicast addresses

The function of the multicast MAC address is to identify receivers belonging to the same multicast group on the link layer

The upper 24 bits of the multicast MAC address are 0x01005f, the 25th bit is fixed at 1, and the lower 23 bits of the MAC address are the lower 23 bits of the multicast IP address

A multicast MAC address uniquely corresponds to an IP multicast address

33. Among the following encryption algorithms, which one requires the use of two different secret keys, the public key and the private key?

AES

RSA

DES

3DES

34. Which of the following descriptions about the packet authentication method in IS-IS are correct? (Multiple choice)

Plaintext authentication is to directly add the password to the message, which is very low in security.

Keychain authenticates the password list that changes over time to further enhance the security of the network

IS-IS carries authentication information in the form of TLV, and the authentication TLV type is 2

MD5 authentication can add the configured password to the message after performing the MD5 algorithm, which improves the security of the password

35. It can be used in a variety of routing protocols. The routing selection tool consisting of if-match and apply clauses is:

route-policy

IP-Prefix

commnityfilter

as-path-filter

36. R1, R2 , R3 and R4 run IS-S , and the DIS Priority of their interfaces is shown in the figure. If the devices start at the same time, () will be elected as D1S. (Please fill in the device name, such as R1)

37. When using authentication in BGP configuration, how should it be configured?

A pair of BGP peers must use the same MD5 password

All routers in the AS must use the same password

All BGP peers on a router must use the same password

All routers in the same AS must use the same password

38. When routers running OSPF protocol exchange DD packets, which of the following parameters will be used to elect the master-slave relationship?

The IP address of the interface

DR priority of the interface

Area ID

Router ID

39. Please pair the following hardware modules with the corresponding functions. The flow between the main control board and switching service boards is responsible for the control plane of the entire system. The interface board and the switching network board provide interfaces for different speed pumps and different transmission media. (Drag and drop questions)

40. Network administrator A wants to use ACL to match only the four routing entries 1, 3, 5, and 7 in the figure. How many ACL rules does network administrator A need to configure at least?

1 10.0.1.0/242 10.0.2.0/243 10.0.3.0/244 10.0.4.0/245 10.0.5.0/246 10.0.6.0/247 10.0.7.0/24

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41. What are the main types of IS-IS Hello packets? (Multiple choice)

Leve1-1-2 LAN IIH

P2P LAN IIH

Leve1-2 LAN IIH

Leve1-1 LAN IIH

42. Which of the following descriptions about URPF (Unicast Reverse Path Forwarding) is correct?

The URPF in strict mode can also be allowed to match the default routing mode at the same time

If the URPF in hip-loose mode does not need to match detailed routing by default

If you deploy URPF in loose mode, if you need to check the default route, you need to check whether the interface matches

If the URPF is in strict mode, as long as the packet can match the detailed route, the P address can be considered legal and the packet is allowed to be forwarded

43. Which of the following descriptions about different types of firewalls are correct? (Multiple choice)

By default, the packet-filtering firewall will perform an ACL matching check for each data packet passing through the firewall.

Application proxy firewall proxy business between internal network and external network users

The stateful inspection firewall only checks the security policy for the first packet that does not hit the session

Stateful inspection firewall security policy checks that the source and destination IP addresses comply with the policy to create a stateful entry

44. In VRRP, which of the following reasons will not cause two Master devices to appear in the same backup group?

The number of virtual IP addresses is inconsistent

Different VRRP versions

Inconsistent message sending intervals

VRRP priorities are inconsistent

45. Which of the following OSPF packets carries master-slave relationship information?

LS Request

Hello

LS Update

46. When a large number of IP phones and WLAN APs need to be accessed in the network, which function switch do we generally consider to choose?

A switch with STP edge port function

A switch with POE function

A switch with SACG function

A switch with QOS function

47. Which of the following statements about DHCP Server spoofer attacks are correct? (Multiple choice)

DHCP Server counterfeiter attack sends wrong IP address and network parameters to the terminal by counterfeiting the DHCP server, causing users to be unable to access the Internet

After the DHCP snooping function is enabled on the Huawei switch interface, the interface is in the trusted state by default.

Using the DHCP nooping function on the Huawei layer 2 access switch and enabling the trusted interface can effectively ensure that the client obtains the IP address and network parameters from the legal DHCP Server

A DHCP fake server can affect multiple terminals in different broadcast domains and cannot obtain correct IP addresses and network parameters

48. Which of the following functions is implemented using NDP 135/136 type messages?

Duplicate address detection

Neighbor Status Tracking

Address resolution

Router Discovery

49. Which of the following descriptions about AS_Path is wrong?

This attribute is a recognized mandatory attribute

This attribute can be used as a condition for BGP route selection

This attribute can determine that there is no loop between IBGP peers

If BGP is configured with route aggregation, the ordered AS_Path attribute will be lost, and there may be a risk of a loop

50. As shown in the figure, the output information of R1 is as follows, then the Router ID of the neighbor router of R1 is () (Multiple choice)

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51. IGMPv1 defines a mechanism for electing a querier when there are multiple routers in a shared network.

True

False

52. Two Huawei devices R1 and R2 form a VRRP backup group. R1 is VRRPv2, and R2 is VRRPv3. Which of the following descriptions about the backup group is wrong?

After R2 configures the command vrrp version-3 send-packet-mode v2v3-both, it can exchange VRRP packets with R1

After R2 configures the command vrrp version-3 send-packet-mode v3-only, it cannot exchange VRRP packets with R1

After R2 configures the command vrrp version-3 send-packet-mode v2-only, it can exchange VRRP packets with R1

By default, R1 and R2 can exchange VRRP packets

53. What are the conditions for volume matching of firewall security policies? (Multiple choice)

The source and destination safe area city

Source and destination IP addresses

Application

Message length

54. Which of the following is not the role of a stack switch?

Master

Backup

Standby

Slave

55. Which of the following types of equipment belong to Huawei data center switches? (Multiple choice)

CloudEngine 16800

CloudEngine S12700E

CloudEngine 12800

NetEngine AR6121

56. SA (Security Association) is a parameter that must be negotiated when an IPsec tunnel is established, so which of the following parameters is used to uniquely identify SA? (Multiple choice)

Source MAC address

Destination IP address

Security Protocol Number

Header checksum of the network layer header

SPI (Security Parameter Index)

Source IP address

57. Regarding the work content of network maintenance, which of the following statements are correct? (Multiple choice)

For the maintenance of equipment software, although the staff can operate on site, it is only recommended to operate remotely

The operation of equipment software is closely related to the specific business of equipment operation

The external environment in which the hardware operates does not require deliberate attention

For the maintenance of the equipment environment, the staff need to visit the site in person, and even use some professional tools to observe and measure it

58. Which of the following descriptions about OSPF is correct?

The DD message does not necessarily carry link state summary information. At this time, the DD message can be used to negotiate the master-slave relationship

The destination address of the Hello packet is 224.0.0.5 and 224.0.0.6

Only LS Update and LS Request messages carry complete LSA information

After the ospf mtu-enable command, OSPF will check the MTU length in the LSU, if it is inconsistent with the MTU length in the message sent by itself, the device will remain in the Exchange state

59. As shown in the figure, the stateful inspection firewall will forward the second TCP three-way handshake message in the figure.

True

False

60. Which of the following route types can OSPF refer to? (Multiple choice)

Direct routing

An OSPF instance different from itself

BGP

IS-IS

Static routing

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61. Add the interface GE1/0/1 in the trusts security zone on the Huawei firewall. At this time, the GE1/0/1 interface belongs to the () (all lowercase) security zone

62. Which of the following statements about the characteristics of a high availability network are correct? (Multiple choice)

will not fail

Can not fail frequently

Once a failure occurs, the business can only be restored through manual intervention

Can recover quickly after a failure

63. As shown in the figure, four routers run IS-IS, and they are all Level1-1-2 routers. Which of the following descriptions are correct? (Multiple choice)

R1 and R2 can only establish a neighbor relationship of Level1-1

R1 and R4 can only establish a neighbor relationship of Level1-2

R1 and R3 can only establish the neighbor relationship of Level1-2

R3 and R4 establish the neighbor relationship of Level1-1 and Level1-2 at the same time

64. As shown in the figure, R1 and R2 are VRRP backup groups with VRID (fill in Arabic characters), where the State of R1 is ________, and the State of R2 is ________. (Fill in English, pay attention to the capitalization of the first letter)

65. When configuring dual-link hot backup, the engineer configures the CAPWAP heartbeat detection interval to be 20 seconds, and enables the dual-link backup function, then the time when the AP detects that the primary link times out and performs active-standby switchover?

75 seconds

20 seconds

60 seconds

90 seconds

66. Which of the following descriptions of each field in the OSPF ASBR-Summary-LSA message is wrong?

The Advertising Router field indicates the ABR that generated the LSA

The Advertising Router field in the ASBR-Summary-LSA of all areas is the same

Link State ID indicates the Router ID of ASBR

Metric indicates the OSPF cost of the ABR reaching the ASBR

67. Regarding the description of the VRRP slave device, which is correct? (Multiple choice)

When receiving a VRRP message with a priority of 0, the Slave will directly switch to the Master

The slave responds to the IP packet whose destination IP address is the virtual IP address

When the slave receives the VRRP message sent by the Master, it can judge whether the status of the Master is normal

The slave will discard IP packets whose destination MMC address is the virtual MAC address

68. In BGP4+, what is the next hop network address field carried by the MIP_REACH_NLRI attribute in the Update message?

Can only be a link-local address

Can be just a link-local address

It can only be a global unicast address

Can carry link local address and global unicast address at the same time

69. Two hosts are connected to the same switch, and they belong to the same VLAN and the same network segment. Now the two hosts cannot ping each other. Which of the following are the possible reasons? (Multiple choice)

The host is configured with wrong static ARP

Port isolation is configured on the switch

The interface is artificially shut down or physically damaged

Wrong port and MAC address binding are configured on the switch

70. In a large-scale WLAN three-layer network, which of the following statements about the DHCP server is wrong? (Multiple choices)

In a large-scale WLAN network, it is generally recommended to use the AC as the DHCP server

In a large WLAN network, it is recommended to deploy an independent DHCP server

In a large-scale WLAN network, the AP can obtain the IP address of the AC from the DHCP server through the option43 parameter

In a large-scale VLAN network, the AP can obtain the IP address of the AC from the DHCP server through the option60 parameter

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71. Which of the following are multi-channel protocols? (Multiple choice)

Telnet

FTP

323

SMTP

72. As shown in the figure, three first-tier switches are interconnected with one HUB, and the STP function is enabled on the switches. Please refer to the figure below for the STP bridge ID settings of the switches. Others are default configurations.

Which option is incorrect in the following description?

Both ports of SWA are designated ports and are in forwarding state.

The go/1 port of SWC is an Alternate port, which is blocked

The G/0/2 port of SWA is blocked.

SWA is the root bridge in this simple network

73. Which of the following log levels are available in the USG series firewalls? (Multiple choice)

Alert

Emergency

Error

Informational

Monitoring

Event

74. What is the process sequence of VLAN Pool assigning VLANs to terminals? (Multiple choice)

The terminal accesses from the divided VLAN

Determine the VLAN Pool and VLAN algorithm bound to the VAP

The terminal accesses the VAP

Assign VLANs to terminals according to the VLAN algorithm

75. Which of the following statements about VLAN hot backup is wrong? (Multiple choice)

During dual-link hot standby, the backup of load sharing can be realized by configuring the priorities of the active and standby ACs to be consistent.

When configuring VRRP hot standby, you can determine the primary and secondary colors of the AC device by configuring the priority of VRRP

When configuring VRRP hot standby, the active and standby ACs must be in the same Layer 2 network

During VRRP hot standby, the active and standby ACs can be in different Layer 2 networks and communicate through Layer 3 for backup.

76. In the process of BGP establishing a neighbor, if the TCP connection fails in the Active state, BGP will return to the Idle state and try the TCP connection again

TRUE

FALSE

77. Which of the following does not belong to IGP?

RIP

IS-IS

BGP

OSPF

78. A route-policy can have multiple nodes, different node numbers are identified by seq-number, and the relationship between different seq-number parts is an "or" relationship.

TRUE

FALSE

79. Which of the following WAN links are packet switching networks? (Multiple choice)

ATM

ISDN

MSTP

PSTN

80. Regarding the description of the Hello message in PIM-SM, the error is:

The routers periodically use Hello messages to keep in touch

In the PIM-SM network, the newly started multicast router needs to use Hello messages to discover neighbors and maintain neighbor relationships

Hello packets are sent to the multicast address 224.0.0.5

Elect DR in multi-router network segment through Hello message

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81. SDN is a new type of network innovation architecture. Which of the following descriptions about the value of SDN is correct? (Multiple choice)

Realize centralized management and simplify network management and operation and maintenance

Shield technical details, reduce network complexity, and reduce operation and maintenance costs

Realize rapid service deployment and shorten service launch time

Realize automatic tuning and improve network utilization

82. Which of the following statements about the concept of multicast is wrong?

Multicast router: A router or a Layer 3 switch that supports Layer 3 multicast function

Multicast group: A collection identified by an IP multicast address

The group refers to the source, the sender of the information, and needs to join the multicast group to provide the forwarding of the group refers to the group message

Multicast group members, multicast group members can be widely distributed anywhere in the network

83. In the MSTP domain, multiple spanning trees can be generated based on instance calculations, and each spanning tree is called an MSTI. Which of the following descriptions about MSTI is correct? (Multiple choice)

Each MSTI can share parameters to calculate its own spanning tree

The role and status of each port on different MSTIs can be different

The spanning tree of each MSTI can have different roots and different topologies

The spanning tree parameters of each port on different MSTIs can be different

84. Multiple spanning trees can be generated in an MST domain, and each spanning tree is called an MSTI. Among them, MSTI is identified by Instance ID, and the value of Huawei equipment is 0~32768.

TRUE

FALSE

85. Please match the following BGP attribute names with their attribute categories. (Drag and drop)

86. Which of the following scenarios is the SD-WAN solution suitable for?

Enterprise branch interconnection

Internal interconnection of enterprise data center network

Enterprise campus wireless network deployment

87. The default time interval for sending BFD detection packets is:

100ms

1000ms

10s

88. Which of the following is the reason why two routers directly connected can establish adjacency relationship but cannot establish OSPF adjacency relationship?

The two routers use different Process IDs

Different network types are set on the two interfaces directly connected to the two routers

Both routers use the same Router ID

The ospf dr-priority of the two directly connected ports is set to 0

89. Which of the following strategies or tools cannot be applied to OSPF?

access-list

prefix-list

route-policy

as-path filter

90. RSTP has been improved on the basis of STP, realizing fast convergence of network topology. However, both RSTP and STP are based on a single spanning tree, and there are some shortcomings, such as? (Multiple choice)

Unable to achieve load balancing of data traffic in VLAN

After the link is blocked, it will carry part of the traffic, which will not cause bandwidth waste

It will cause some VLAN paths to fail

It will shovel the problem of suboptimal path

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91. Which of the following routing protocols does not belong to IGP?

IS-IS

BGP

OSPF

RIP

92. Enterprise business often has strict requirements on the quality of service of the network. Which of the following aspects are commonly used to describe the quality of service of the network? (Multiple choice)

stable

Bandwidth c. Delay

Jitter

Security

93. Which of the following statements about routing tools is incorrect? (Multiple choice)

The access control list is used to match the address of routing information or data packets, and filter routing information or data packets that do not meet the conditions

The prefix list can only be used to filter routing information, not data packets

community-filter is a tool used to match the community attributes in BGP routing information. It can filter BGP routes independently according to the Community attributes of BGP routes

as-path-filter is a tool used to match the AS_Path attribute in BGP routing information. It can filter BGP routes independently according to the AS Path attribute of BCP routing

94. The four routers run lS-IS and have established adjacency. The area code and the level of the router are marked in the figure. Which of the following statements is correct?

The LSP of R4 does not exist in the LSDB of router R1

The LSP of R3 does not exist in the LSDB of the R2 router

The LSP of R4 does not exist in the LSDB of R3 router

The LSP of R4 does not exist in the LSDB of the R2 router

95. If a modular switch only supports the cluster card on the main control board to establish a cluster connection, it means that the modular switch uses the CSS2 stacking technology.

True

False

96. When OSPF external routes are imported, Metric-Type-1 or Metric-Type-2 will be used, so which of the following is the calculation method of the routing cost of Metric-Type-1 type?

The sum of the cost from the nearest ABR to the ASBR and the cost from the ASBR to the destination address of the route

The sum of the cost from the device to the corresponding ASBR and the cost from the ASBR to the destination address of the route

The cost from this device to the corresponding ASBR

Cost from the ASBR to the destination address of the route

97. Which business in the enterprise usually needs to optimize the user experience? (Multiple choice)

Video surveillance business

Videoconferencing services

Voice call service

Network management business

98. Which of the following descriptions about OSPF special areas is wrong?

The difference between the NSSA area and the Stub area is that the NSSA area allows the introduction of external routes of the autonomous system, and the ASBR advertises Type 7 LSAs to the area.

The difference between the Stub area and the NSSA area is that the Stub area does not allow detailed inter-domain routing

The difference between the Stub area and the Totally Stub area is that the Stub area allows detailed inter-domain routing

The role of the Totally Stub area is to allow the ABR to advertise Type 3 LSA default routes, and does not allow the existence of external routes of the autonomous system and routes between areas.

99. A network project cannot exist alone and requires the cooperation of related systems, so what are the supporting projects usually included? (Multiple choice)

Power supply system

Air Conditioning Equipment

means of transport

Office equipment

Weak current wiring

100. In the RSTP network shown in the figure, according to the configuration of SWC in the figure, it can be judged that the type of E0/1 port of SWC is : (Multiple choice)

Edge port

Preliminary port

Designated port

Root port

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101. Regarding BGP MED, which of the following descriptions are correct? (Multiple choice)

The default value of BGP route MED is 0

By default, BGP route selection rules can compare the distance between routes from different autonomous systems

By default, if there is no MED value set in the route attribute, press Process. If the bestroute med-none-as maximum command is configured. Then the maximum value of the MED correction is 4294967295 to process

In BGP route selection rules, the priority of MED is lower than AS-Path, Preferred-Value, Local-Preference, Origin.

102. In a large-scale VLAN network, when the VLAN Pool uses the HASH method to allocate VLANs, it will evenly divide the number of users in each VLAN.

TURE

FALSE

103. Which of the following description about OSPF is correct?

OSPF LSA is regularly updated every 30 minutes

OSPF floods an LSU every 5s

OSPF uses the Bellman-Ford algorithm, and each router runs the algorithm independently

OSPF itself has no confirmation mechanism, so 0SPP relies on the lower layer protocol, namely TCP confirmation.

104. Which of the following SA descriptions about various messages is wrong? (Multiple choice)

DD only contains the summary information of the LSA, which includes LS Type, LS ID, Advertising Router and LS Sequence Number

LS Request message only has LS Type, LS ID and Advertising Router

LS Update message contains complete LSA information

LS Ack message contains complete LSA information

105. When the OSPF-enabled router is in the Init state, the destination address of the Hello packet is ___. (Please fill in the dotted decimal IP address)

106. IGMP Snooping mainly solves the problem of:

Legality of IGMP Report messages

There are many receiver hosts on the network segment, and the router will receive many IGMP Report messages.

Solve the problem of broadcasting multicast data packets on Layer 2 devices, and use them to manage and control the forwarding of multicast data packets

The receiver host only supports the IGMPv2 protocol, but the SSM multicast model is used in the network

107. The four routers run IS-S and have established an adjacency relationship. The area numbers and router levels are marked in the figure. What is the cost of R4 reaching 10.0.2.2/32?

108. Please match the following ICMPv6 packet types and packet content items. (Drag and drop)

ICMPv6 Type135 NS （ Neighbor Solicitation ）

ICMPv6 Type134 RA （ Router Advertisement ）

ICMPv6 Type137 Redirect （ Redirect ）

ICMPv6 Type133 RS （ Router solicitation ）

ICMPv6 Type136 NA （ Neighbor Advertisement ）

109. In an OSPF network, it is found that some routes are constantly flapping. What are the possible reasons for this phenomenon? (Multiple choice)

The physical port of the device is vibrating

The OSPF Router-ID of some devices conflict

The OSPF process IDs of some devices are inconsistent

The authentication of some devices does not match and the neighbor cannot be established

110. In inter-domain packet filtering, which of the following traffic directions belongs to the Outbound direction?

Trust->Local

Trust->Untrust

Untrust->DMZ

Untrust->Trust

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111. Regarding boundary security optimization, which of the following options are correct? (Multiple choice)

The purpose is to prevent/reduce external cyber attacks and harm

The optimization location is usually at the network boundary

Optimization methods include attack prevention technology, packet filtering technology, hardware firewall, etc.

The purpose is to achieve user security access control

112. ACL matching results include " match (allow) ", " match (deny) " and " mismatch ".

TRUE

FALSE

113. The ABR in the OSPF complete Stub area does not flood the area with Type 3, Type 4, and Type 5 LSAs. Therefore, the ABR in the complete Stub area needs to manually release a default route to the area to guide how the data packets reach the destination of outside of the AS.

True

False

114. By default, how many seconds is the hold time of the BCP peer adjacency?

120 seconds

60 seconds

10 seconds

180 seconds

115. Which of the following descriptions about the P/A mechanism in RSTP are correct? (Multiple choice)

In RSTP, the main purpose of the P/A mechanism is to speed up the speed at which the upstream port enters the Forwarding state.

In RSTP, when the switch receives the RST BPDU with the Agreement bit set from the opposite end, it will immediately put the designated port into the Forwarding state

In RSTP, the main purpose of the P/A mechanism is to speed up the speed at which the downstream port enters the Forwarding state

In RSTP, all switches will send RST BPDU with the Proposal bit set in the initial state

116. Router A and Router B are directly connected, OSPF is enabled and the port network type is broadcast. If the two routers establish an adjacency relationship, which of the following items are necessary? (Multiple choice)

The mask is consistent

Dead time interval is consistent

Dir-priority consistent

The MTU size is the same

The Hello time interval is the same

Router IDs are the same

117. Which of the following tools are not only used for BGP routing protocol? (Multiple choice)

community-filter

as-path-filter

ip-prefix

extcommunity-filter

route-policy

ACL

118. When a router running IS-IS finds that the LSDB is out of sync, what kind of message will it send to request its neighbors to send a new LSP?

LSP

PSNP

CSNP

Hello

119. Regarding Huawei Network Optimization Service (NOS), which of the following options are correct? (Multiple choice)

Improve network availability and performance

to increase productivity c. to reduce costs

Enabling knowledge transfer

120. Please pair the following backup technologies to ensure the reliability of machine A's network with their corresponding features.

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121. As shown in the figure, in a pure IPv6 environment, if you want to realize the communication between PC1 and PC2, which of the following groups of addresses can be configured on PC1 and P2 respectively?

2001:FDC:1/64 2001:FDC::2/64

2001:FDC::1/64 2001:FDC1::2/64

FD00:1AC0:872E::1/64 FDO0:2BE1:2320::1/64

FE80::1/64 FE80::2/64

122. What are the three ways of sending IPV4 packets? (Multiple choice)

Anycast _

Multicast

Unicast

broadcasting

123. Regarding the description of the permanent multicast address, the error is:

All routers running OSPF protocol listen on 224.0.0.5

All hosts and routers in the network segment listen to 224.0.0.1

All routers listen on 224.0.0.2

All routers running the PIM protocol listen on 224.0.0.100

124. Which of the following reasons may cause the failure of the BGP neighbor relationship? (Multiple choice)

ACL filters TCP port 179

The router IDs of the neighbors conflict.

Use the Loopback interface to establish an EBGP neighbor relationship without configuring peer ebgp max-hop

The peer connect-interface is not configured when the Loopback interface is used to establish a neighbor relationship.

125. As shown in the figure, R1 and R2 constitute a VRRP backup group with a VRID of 1. Which of the following descriptions about the VRRP master and backup election process is wrong?

In the case of simultaneous startup, R1 switches to the aster state faster than R2

Finally, R1 will send a free ARP message

After the two devices are initialized, they will first switch to the Backup state

Both devices will switch to the Master state after their respective NASTER DoV timers expire

126. You use a Huawei router as an SSH client to log in to another Huawei router, but the login fails. You suspect that it may be a configuration error on the SSH server side. When checking the cause of the server configuration failure, which of the following items is the most impossible?

The SSH protocol is not bound under the VTY interface of the user interface

User service type, authentication type, and user authentication service type are not configured

The server and client SSH versions are inconsistent

The first SSH authentication function is not enabled

127. Which of the following descriptions about the introduction of external routes to 86P is correct? (Multiple choice)

When importing external routes, the Preferred_Value defaults to 150

When importing an external route, you can directly define its ED value for the same type of route

When the external route is imported, its AsPath can be modified through the Route-Policy tool

When the external route is imported, the default origin attribute is igp, and its attribute can be modified to incomplete through the Route-Policy tool

128. Which of the following dynamic routing protocols can be applied to IPv6 networks? (Multiple choice)

Is-ls

BGP6

IS-ISv6

OSPFv3

129. The LAN mapping table is an attribute of the IST domain and is used to describe the mapping relationship between VLANs and MSTIs. Each VLAN can correspond to multiple ISTIs, and one MST can correspond to multiple VLANs.

TRUE

FALSE

130. Regarding the description of the summary automatic command and BGP aggregation, the error is:

This command is used to implement automatic aggregation, and its priority is higher than manual aggregation

After configuring this command, BGP will aggregate routes according to natural network segments

This command is used to enable automatic aggregation of locally imported routes

After configuring this command, BGP only sends the aggregated route to the peer

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131. The flow behavior of MQC supports multiple actions on packets. Please match the actions of the following MQC flow behaviors with their functions. (Drag and drop questions)

132. RPF has the function of preventing multicast forwarding loop.

True

False

133. In BGP, the community attribute is an optional transitional attribute, which is a routing label and is used to simplify the execution of routing policies.

It is divided into custom community attributes and public community attributes, so which of the following items belong to public community attributes? (Multiple choice)

No_Export

Internet

No_Advertise

No_Export Subconfed

134. Which of the following statements about the forwarding plane of switching equipment is incorrect?

Realize packet encapsulation and decapsulation

Composed of main control board and interface board

Provide high-speed non-blocking data channel

Statistics of messages can be realized

135. Which of the following are sources of demand for network optimization? (Multiple choice)

After long-term network maintenance, put forward relevant suggestions for some problems and improvement points summarized, and carry out centralized rectification

It is necessary to carry out video conferencing services in the network, and it is necessary to add switching equipment that supports Layer 2 multicast kinetic energy

The environmental problem of a weak electric well, the signal line is seriously aging, and needs to be replaced intensively

Enterprise information security needs, adding new security equipment

136. After the IGMP proxy device receives the report message of a certain multicast group, if the corresponding multicast group is not found, the IGMP proxy device will send a report message counting the multicast group to the access device, and add the multicast group to the forwarding table.

True

False

137. Which of the following parameters cannot be modified by the apply command of Route-Policy?

OSPF external route type

OSPF overhead

OSPF process ID

OSPF imports area types

138. In BGP route selection rules, routes with higher Local_Pref values have priority.

True

False

139. In the state detection firewall, when the state detection mechanism is enabled, when the second message (SHN+ACK) of the three-way handshake reaches the firewall, if there is no corresponding session table on the firewall, then which of the following statement is correct?

If the firewall security policy allows the packet to pass through, create a session table

By default, after the status function is turned off, and the allow policy is configured, it can pass

The message must pass through the firewall and establish a session table

If the firewall security policy allows the packet to pass through, the packet can pass through the firewall

140. As shown in the picture, there are the following configurations under BGP. Which of the following descriptions is wrong? (Multiple choice)

[HUAWEI-bgp] timer keepalive 30 hold 90

[HUAWEI-bgp] peer 1.1.2 timer keepalive 10 hold 30

The timer takes the minimum value, so the final result is that the timer value of peer 1.1.1.2 takes keepalive10 hold 30

Peer configuration takes priority, so the final result is that the timer value of peer 1.1.1.2 takes keepalive 10 hold 30

The global configuration takes precedence, so the final result is that the timer value of peer 1.1.1.2 takes keepalive 30 hold 90

The default configuration is timer Keepalive 60 hold180, so pee r1.1.12 has a faster speed of detecting Peer connection failure than the default value

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141. The shortest path from the multicast source to the receiver is called the shortest path tree SPT.

TRUE

FALSE

142. When configuring the multicast routing protocol, you first need to execute the () routing-enable command, and then configure the PFIM protocol. (Please fill in the complete command without abbreviation, and use all lowercase English letters).

143. The first 4 bits of the IP multicast address are fixed 1110, corresponding to the upper 25 bits of the multicast MAC address. Of the last 28 bits of the IP multicast address, only 23 bits are mapped to the MAC address, so 5 bits of address information are lost. The direct result is that 32 IP multicast addresses are mapped to the same MAC address.

True

False

144. The command format of the prefix list (IP-Prefx) is ip ip-prefx ip-prefix-name [ index index-mnumber ] permit / deny] ipv4-address mask-length [ greater-equal greater-equal-value ] [ less -equal less-equalvalue ], if only greater-equal is specified but less-equal is specified, the prefix range is:

[0. greater-equal-value]

Unlimited

[mask-length ， greater-equal-value]

[greater-equal-value.32]

145. The above information about display ospf peer output, the correct description is:

OSPF Process 1 with Router ID 10.1.1.2

Neighbors

Area 0.0.0.0 interface 10.1.1.2(Gigabitethernet1/0/0)'s neighbors

Router ID: 10.1.1.1

Address:10.1.1.1

State: Full Mode: Nbr is Slave Priority: 1

DR:10.1.1.1BDR: None PERSON: 0

Dead timer due in 38 sec

Retrans timer interval: 5Neighbor is up for 00: 00:04

Authentication Sequence: [0]

After negotiation during the DD exchange process, the local end becomes the Slave

Address: 10.1.1.1 indicates that the local interface address is 10.1.1.1

Router ID indicates that the local router ID is 10.1.1.1

The Designated Router (DR) as the address is 10.1.1.1

146. Which of the following descriptions about the OriginatorID attribute in BGP are correct? (Multiple choice)

OriginatorID is a recognized arbitrary attribute

If there are multiple RRs in As, the OriginatorID attribute is created by the first RR

When a route is reflected by RR for the first time, RR adds the OriginatorID attribute to this route to identify the originating router of this route

When other BGP Speakers receive this route, they will compare the received OriginatorID with the local RouterI

If the two IDs are the same, BGPSpeaker will ignore this route and do not process it.

147. When the Hold Time time supported by two devices running BGP is inconsistent, the neighbors will negotiate to use the shorter time as the Hold Time time interval.

TRUE

FALSE

148. All single switches in the stacking system are called member switches, which can be divided into different roles according to different functions. Please correspond the roles of the following member switches with their functions. (Drag and drop questions)

149. Which of the following parameters do we generally use to measure the performance of switches? (Multiple choice)

Port Density

CPU main frequency

Exchange capacity

Packet forwarding rate

MAC table capacity

Port speed

150. There are two BFD detection modes. In ( ) mode, the local end sends BFD control packets at a certain sending interval, and the detection location is the remote end. The remote end detects whether the local end periodically sends BED control packets.

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151. Which of the following aspects should be considered in the preliminary analysis of the cutover project? (Multiple choice)

Necessity

Feasibility c. risk d. cost

152. As shown in the figure, the stateful inspection firewall will forward the packet because the packet conforms to the firewall session state.

True

False

153. Which of the following is wrong about OSPF discarding directly?

The DD packet carries the LSA header information to describe the link state summary information

Hello packets are used to discover and maintain neighbor relationships. On broadcast networks and NBLA networks, Hello packets are also used to elect DR and BD

The DD packet contains all LSA information, which can be used to periodically synchronize link state database information between neighbors

The intervals for sending Hello packets between the two routers must be the same, otherwise neighbors cannot be established

154. Which type of TLV does IS-IS use to describe IPInterface Adiress?

132

131

129

128

155. Which TLV does IS-IS use to describe IP Interface Address?

129

128

131

132

156. Routers R1 and R2 establish an OSPF neighbor relationship. When R1 receives an LSU message from R2, which of the following methods will it use to inform R2 that it has received the LSU?

R1 will respond to R2 with a DD message, in which the sequence number of the LSA header is the same as that of the LSU

R1 will respond with LSAck message to R2

R1 will transmit the TCP packet with the ACK bit set to 1 to R2

R1 will return the LSU with the same serial number to R2

157. In the live network, the stack upgrade can be performed by specifying the version or actively synchronizing the version with the main switch when the new switch joins. Which of the following methods is used to upgrade by sub-area?

Smooth upgrade

Intelligent upgrade

Traditional upgrade

Transition upgrade

158. If roaming is implemented between two APs, the same security policy must be met. The forwarding mode and the same () (if English words are involved, please use uppercase)

159. The LSDB output of a router R2 is shown in the figure. According to the analysis of the content in the figure, which of the following options is wrong?

Area boundary route aggregation exists in Area1

ASBR exists in Area 2, and the Router ID of ASBR is 6.6.6.6

R2 is deployed in the backbone area, and R2 is an ABR

There is no Stub area in the entire environment involved in the figure

160. In the Portal authentication scenario based on MAC priority, when the user successfully completes Portal authentication and disconnects from the network within a certain period and reconnects, he can directly access through MAC authentication without entering the username and password to perform Porta1 authentication again.

True

False

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161. As shown in the figure, the four Huawei switches have been running and configured with the MSTP protocol. Now it is necessary to set SW3 as the root bridge of Instance 10. Which of the following commands can be used to achieve this? (Multiple choice)

stp instance 10 root primary

stp vlan 10 root primary

stp instance 10 priority 4096

stp root primary

162. As shown in the figure, in order to ensure the reliability of the WLAN networking, a company has enabled the dual-link hot backup function in the networking.

Which of the following descriptions about active/standby negotiation are correct? (Multiple choice)

If the priority values and load conditions of AC1 and AC2 are the same, the one with the smaller IP address will be given priority

If the value and load of AC1 and Ac2 are the same, the one with the larger IP address will be given priority

The AP will select AC2 as the primary AC

The AP will select AC1 as the primary AC

163. Which of the following BGP attributes does not have to exist in the Update message?

Origin

HED

AS_Path

Next Hop

164. In the OSPF routing protocol, the asbr-summary command can be followed by the not-advertise parameter, which means not to advertise the aggregated route.

True

False

165. One of the characteristics of OSPF is that it only supports MD5 authentication.

True

False

166. Which of the following configurations must be included in order for non-directly connected EBGP neighbors to be established normally? (Multiple choice)

peer ebgp-max-hop

Peer connect-interface

peer ignore

peer as-number

167. What are the key components of building an IP wide-area bearer network solution together with Huawei NetEngine intelligent routers?

iMaster NCE-Fabric

iMaster NCE-IP

iMaster NCE-Campus

iMaster NCE-WAN

168. What are the main maintenance training after project delivery? (Multiple choice)

Networking and configuration training

Routine Maintenance Training

Emergency Troubleshooting Training

Management and safety production training

169. What are the possible reasons for a user reporting that he cannot receive emails normally through his email client? (Multiple choice)

The user does not have the appropriate permissions

Mail server failure

Link failure

User client settings are wrong

170. IPv6 link-local addresses can be generated through stateless autoconfiguration.

True

False

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171. By default, VRP will automatically aggregate the routes imported by BGP.

True

False

172. The Hold time carried by BGP neighbor PeerA in Open is 90s, the Hold time carried by Peer in Open is 30s , and the time for PeerA and PeerB to send Keepalive messages after successful connection establishment is

30s

90s

Do not send Keepalive messages

10s

173. What does the project implementation plan mainly include? (Multiple choice)

Cutover process

Risk Control Measures

Staffing

Time planning

174. The Huawei Cloud Campus solution supports the free mobility function. This function can be configured through graphical policies to enable users to access anytime and anywhere.

TRUE

FALSE

175. Which of the description about OSPF route summarization is wrong?

Any router in OSPF can perform route aggregation operations

Inter-area route aggregation refers to the aggregation of routing information with the same prefix, and only one route is published to other areas

OSPF has two route aggregation methods: ABR aggregation and ASBR aggregation

Through route aggregation, routing information can be reduced, thereby reducing the size of the routing table, and improving the performance of the router

176. What are the traffic statistics methods? (Multiple choice)

Netstream

SNMP

Port mirroring

IP packet count

177. In the MSTP protocol, each MST Instance uses the RSTP algorithm alone to calculate a separate spanning tree.

True

False

178. Which of the following messages does BGP support? (Multiple choice)

Hello

Keepalive

Update

Open

179. Regarding the description of IGMP Snooping-working mechanism, which is the correct?

The layer 2 switch establishes and maintains the PIM routing table on the layer 2 by continuously monitoring IGMP messages.

When IGMP Snooping is not running, the multicast message will be broadcast on the second layer. After running IGMP Snooping, the message will no longer be broadcast on the second layer, but will be multicast on the second layer.

If the host sends an IGMP leave message, the switch will add the host to the corresponding multicast table.

If the host sends an IGMP host report message, the switch will delete the multicast entry corresponding to the hos.t

180. An existing enterprise has upgraded the network bandwidth, and the export bandwidth has been upgraded from 200M to 1000M. Which of the following devices need to be cut over? (Multiple choice)

Carrier Fiber Box

Core switch

Access switch

Perimeter Firewall

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181. Which of the following are the advantages of using stacking and clustering technologies to build a campus network? (Multiple choice)

The business interruption time is greatly reduced

Improve network equipment and link utilization

Simplifies network management and reduces the complexity of network deployment planning

Can effectively reduce network power consumption

182. Which of the following statements about MSTP is correct? (Multiple choice)

MSTP supports compatible operation with RSTP

MSTP can realize the load sharing of traffic among different LANs

More port roles than RST

MSTP

The BPDU format of MSTP is the same as that of RSTP

183. When the BFD detection intervals at both ends are 30ms and 40ms respectively, which of the following option descriptions is correct?

The bfd session cannot be established

The bfd session can be established, take 40ms after negotiation

The bfd session can be established, and each can be sent at intervals according to its own time

The bfd can be established, take 30ms after negotiation

184. There are many ways to establish clusters with modular switches. What methods does Huawei modular switches support to establish clusters? (Multiple choice)

Established through the cluster card on the interface board

Established through cluster cards on the main control board

Established through the service interface on the interface board

Established through the cluster card on the switching network board

185. There can be multiple nodes under a route-policy. Different nodes are identified by node. Each node can have multiple if-match and apple clauses. Which of the following descriptions is wrong? (Multiple choice)

The relationship between the if-match clauses under each node is " or "

The relationship between the if-match clauses under each node is " and "

There is an " and " relationship between different nodes

There is an " or " relationship between different nodes

186. Which of the following types of headers is carried on the BFD detection message?

MAC header

UDP header

TCP header

IP header

187. Which of the following information can be obtained by understanding the industry background of the project?

Industry conventional solutions

Client's organizational structure

The problem to be solved by the project

Scope of the project implementation

188. esight uses different colors to distinguish different alarm levels. Red means urgent, orange means important, yellow means minor, and blue means reminder.

Which of the following statements about different alarm levels are correct? (Multiple choice)

Prompt: Potential or imminent failures affecting the business are detected, but the alarms that currently have little impact on the business

Important: It has already affected the business, if the alarm is not dealt with in time, it will have more serious consequences

Critical: Alerts that have affected the business and require immediate corrective action

Minor: There is a certain impact on the business at present, but corrective measures need to be taken to prevent serious fault alarms

189. A VRRP virtual router can only have a virtual IP address.

True

False

190. Regarding the command of OSPF route aggregation, which description is correct? (Multiple choice)

The abr-summary command is a command in the OSPF area view

Advertise is the missing first parameter of the abr-summary command, that is, if the abr-summary command does not specify not-advertise, the default is advertise

not-advertise is the missing first parameter of the abr-summary command, that is, if the abr-summary command does not specify advertisement, the default is not -advertis

The asbr-summary command is a command in OSPF view

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191. There is an existing switch connected to a designated port through a certain port, but this port does not forward any packets, but can monitor network changes by receiving BPDUs, so which of the following options should the role of this port be?

Alternate port

Disable port

Root port

Designate port

192. Which of the following descriptions about Filter-Policy are correct? (Multiple choice)

Filter-Policy can be used on both OSPFv2 and OSPFv3

In the distance vector protocol, because routing information is passed between devices, Filter-Policy can directly

Filtering In the link state routing protocol, the routing table is generated through the LSDB, so Filter-Policy essentially filters the LSA in the LSDB

In the distance vector protocol, if you want to filter out the route from the upstream device to the downstream device, you need to configure filter-policy export on the downstream device.

193. As shown in the figure, RED calls ip as-path-filter1 in the inbound direction, then the route 10.0.0.0/24 will be learned by RE_D from the path _________. (Please fill in 1 or 2)

194. The comparison items of the master switch election in the stack include? (Multiple choice)

Running status

Stack ID

MAC address

Stack priority

195. In the VRP system, which of the following descriptions about OSPF cost (Cost) is wrong?

Cost takes effect in the incoming direction of traffic on the interface

The default cost value of the Loopback interface is 1

Modifying the reference bandwidth of OSPF will affect all local interface overheads in OSPF

OSPF will automatically calculate the cost value based on the bandwidth of the interface. The calculation formula is interface cost-bandwidth reference value / interface bandwidth

196. The connection between Site_1 and Site_2 is shown in the figure. According to the configuration analysis in the figure, when a data packet is sent from Site1 to Site_2, the Destination IP address in the Delivery Header of the packet after R1 encapsulation is ( ). (Please fill in the dotted decimal IP address, do not fill in the mask. Such as 192.168.0.1)

197. Regarding the LSA age field, which description is correct? (Multiple choice)

The unit of LSA age is seconds, and the LS age of LSA in LSDB increases with time

If the LS age of an LSA reaches LSRefreshTime (30min), the producer of this LSA needs to regenerate an instance of the LSA

The unit of LSA age is seconds, and the LS age of LSA in LSDB decreases with time

If the LS age of an LSA reaches LSRefreshTime (30min), any router can regenerate an instance of this LSA for this LSA

198. Through the following display commands, by which of the following you can judge whether the switch loop failure is caused?

[CE02]displaytrapbuffer Pleasecheckthenetworkaccessedtoflappingport

[CE02]displaycpu-usage

[CE02]displaycpu-defendstatistics

[CE02]displayinterfacebriefincludeup

199. In different scenarios, RSTP provides different protection functions. Which of the following statement is wrong?

After the BPDU protection function is enabled on the switching device, if the edge port receives RST BPDU, the edge port will be set as a non-edge port, and the spanning tree calculation will be performed again

After the anti-TC-BPDU message attack function is enabled, the number of times the switching device processes TC BPDU messages within a unit time is configurable

The designated port with the root protection function enabled, its port role can only remain as the designated port

The designated port with root protection enabled, when the port receives a better RSTBPDU, the port will enter the Discarding state and no longer forward packets. If the port does not receive a better RST BPDU for a period, it will automatically return to the normal Forwarding state

200. By default, the OSPF port overhead is related to the bandwidth of the port. The calculation formula is bandwidth-reference/ban dwidth. The overhead is only calculated by OSPF itself and cannot be changed manually.

True

False

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201. What functions can Huawei iMaster NCE products achieve? (Multiple choice)

Devices can be managed across manufacturers

Network Automation

Provide a variety of open API interfaces

Predictive Maintenance Based on Big Data and Al

202. Whether a non-edge port moves to the forwarding state is one of the criteria for RSTP to detect topology changes.

TRUE

FALSE

203. Regarding the description of the Keepalive message of BGP, the error is:

Keepalives are periodically sent between two BGP neighbors

Keepalive messages are mainly used to confirm the running status and link availability between peer routers

The Keepalive message contains only one BGP data header

By default, the Keepalive interval is 180s

204. Which of the following descriptions about the prefix list is correct?

Use the resetip-prefix command to reset the prefix list to re-match routes

When applying the prefix list to the port, you can select the in direction and the out direction

The prefix list matches the route to a certain network segment, which is exactly the same as the ACL

The prefix list can be used not only in BGP, but also in IGP

205. What are the factors that cause traffic interruption after a network failure? (Multiple choice)

Fault Propagation Time

Routing Loops

Response time to a single device failure (table item update)

Fault detection time

206. What problems should an engineer check before the equipment is installed and powered on? (Multiple choice)

Whether the signal cable has been correctly installed and bundled according to the approved specifications

Whether the device is connected according to the planned topology

Whether the ground wire has been installed correctly according to the specification

Whether the power cord has been correctly installed according to the specification

207. Which of the following descriptions about the difference between stacking and clustering is wrong? (Multiple choice)

Both stacking and clustering can improve resource utilization and reduce the complexity of network planning

The difference between stacking and clustering is that a stack of modular switches is called a stack, and a boxed switch is called a cluster.

Both stacking and clustering can be combined with link aggregation technology to easily build a highly reliable, loop-free campus network

Both stacking and clustering can combine multiple switches to logically virtualize into one switch

208. In PIM-SM, the wrong description about RP is:

The initial multicast streams of all groups in the shared tree are forwarded to the receivers through the RP

One RP can provide multiple multicast services at the same time, and one multicast group can correspond to multiple RPs

RP can be responsible for the forwarding of several or all multicast groups, and there can be one RP in the network

All the members of the group and the multicast sources that send multicast data to the group converge to the only RP

209. Which statement about IGMP Proxy is correct? (Multiple choice)

IGMP Proxy can work with NQA to detect the link status and realize fast switchover between active and standby links.

IGMP Proxy is usually deployed on devices between member hosts of access devices

The downstream interface of the IGMP Proxy device generates a multicast forwarding entry through the information that the member host joins and leaves the multicast group

The IGMP Proxy device cannot replace the IGMP querier to send query messages to downstream member hosts to maintain group membership

210. There are many differences between data center switches and ordinary campus switches. Which of the following features are available in data center switches but not supported by campus switches? (Multiple choice)

MSTP

TRILL

NFV

FCOE

VXLAN

Page 22 of 29

211. What characteristics must a high-risk operation plan have? (Multiple choice)

precise

Strong operability

has verification

can return

212. Which of the following descriptions of the NSSA area is wrong?

The ABR in the NSSA area will convert Type 7 LSA into Type 5 LSA, and inject the LSA into the backbone area, thereby flooding the entire OSPF domain

The NSSA area can import external routes without learning external routes from other areas of the 0SPF network

Type 3 LSAs are not allowed inside the NSSA area, nor are Type 4 and Type 5 LSAs allowed inside the area.

The ABR in the NSSA area will automatically inject a default route into the area, which is described by type 7 LSA

213. By default, which of the following types does OSPF external routing belong to?

Type 2

Type 1

Type 5

OSPF will calculate the most suitable external route type, so there is no default

214. Routers R1 and R2 are directly connected through GigabitEthernet0/0/0 respectively, and try to establish an OSFP neighbor relationship, but the neighbor relationship has not been successfully established. The troubleshooting process is shown in the figure.

So which of the following operations can make R1 and R2 neighbor management established normally?

[R2] ospf 1 [R2-0spf-1] ara0 [R2-ospf-1-area-0.0.0.0] timer hello 10

[R2] interface GigabitEthernet 0/0/0 [R2-GigabitEtherneto/0/0] undo ospf timer hello

[Relintertace GigabitEthernet 0/0/0 [R2-GigabitErhernet0/0/0] ospf timer hello 20

[R2] ospf 1 [R2-ospf-1] area0 [R2-ospf=1-area-0 ， 0.0.0lundotimer hello

215. The relationship between various rules in MQC flow classification is divided into: and or or, the default relationship is ()

216. What is the function of the DETAIL-SUPPRESSED option of the AGGREATE command?

Suppress the delivery of the generated aggregated routes to the P routing table

Suppress the delivery of the aggregated detailed routes to the P routing table

Only advertise aggregated routes to other BGP neighbors

Advertise aggregated routes and detailed routes to other BGP neighbors

217. By default, when the BGP neighbor's egress routing policy (route-policy) changes, manual operations are required to resend the Update message to the neighbor.

TRUE

FALSE

218. As shown in the figure, the four routers in the same LAN run IS-IS, and R1 is DIS. Then R2, R3 R4 respectively establish adjacency relationship with R1, and R2, R3, R4 do not establish adjacency relationship.

True

False

219. Which of the following messages does BGP use to report error messages and terminate peer relationships?

Update

Open

Keepalive

Notification

220. The shortest path from the multicast source to the receiver becomes the shortest path tree SPT.

True

False

Page 23 of 29

221. Will setting the Community attribute of the route through the routing policy affect the route selection?

It can be indirectly affected. By setting the Community attribute of the route, the route can be classified, and then set different route selection-related attributes according to the category, such as Local_Pre, MED, etc., to achieve the purpose of affecting route selection

It cannot be affected, because the Community attribute of the route is a non-transitional attribute and cannot be passed between routers

It can be affected indirectly. By setting the Community attribute of the route, the route can be classified, and then different attributes related to route selection can be set according to the category. These attributes only include Loacal_Pre and MED, so as to achieve the purpose of affecting route selection

After the router receives the routing update whose Commmity attribute is No_ Advertise, it will not advertise it outside the local A

222. When unpacking and inspecting the goods, what should be checked on the packing list? (Multiple choice)

Part number

Part Quantity

Project name

223. As shown in the figure, OSPF is enabled on all interfaces of the router, and the configuration of R1, R2, and R3 is shown in the figure, and a Type3 LSA with a Link State ID other than 0.0.0.0 will be generated. (Please fill in the device name, such as R1)

224. Which of the following descriptions about the process of establishing a neighbor relationship with IS-IS are correct? (Multiple choice)

On the P2P link, the two-way handshake mechanism can be used to establish a neighbor relationship, which is faster and more stable than the three-way handshake mechanism

On a broadcast network, the DIS needs to be elected

When the neighbor relationship is established through the three-way handshake mechanism on the P2P link, the neighbors of both parties are identified as Up, which means that the two parties have successfully established the neighbor relationship

For Level1-1 routers, the area numbers can be inconsistent

225. Which of the following values can be set for the security level of the security zone customized by the USG series firewall? (Multiple choice)

150

100

226. IGMP SSMM APPING does not process IGMPv3 report messages. To ensure that hosts running any version of IGMP on the same network segment can obtain SSM services, it is necessary to run IGMPv3 on the interface of the multicast router connected to the network segment where the member hosts are located.

TRUE

FALSE

227. The routing attributes of the three routing entries are shown in the figure. Assuming that the next hops of the three routing entries are all reachable, when the three routing entries arrive at the BGP router in sequence, by default, which routing entry will BGP choose in the end?

Route A

Route B

Route C

228. If a BGP device is configured with the ip as-path-filter 1 permit ^12. *35$ command, which of the following AS_Paths can be correctly matched?

AS_Path （ 123 35 28 ）

AS Path （ 35 123 28 ）

AS_Path （ 35 28 12 ）

AS_Path （ 12 28 35 ）

229. The following is the BGP error output information of a router. The wrong description of this information is:

display bgp error

Error Type: Peer Error

Date/Time:2010-03-2211:40:39

Peer Address:10.1.1.2

Error lnfo Router-id conflict

Error Type shows the error caused by neighbor relationship error

The neighbor address of the router is 10.1.1.2

The cause of the error may be due to the wrong writing of the AS number of the peer

The error occurred at 11:40:39 on March 22, 2010

230. Regarding the purpose of management security optimization, which of the following is the most appropriate?

Protect sensitive management information from illegal theft

Prevent and reduce external cyber-attacks and harms

Ensure the access security of key business

Realize user security access control

Page 24 of 29

231. Regarding the description of the routing tool, which of the following statement is wrong?

route-policy can only match routes and data packets, and cannot be used to modify routing attributes or data packet forwarding behavior

Prefix list (ip-prefix) matching object is the destination address of routing information

The access control list (ACL) is used to match the IP routing information or the address of the data packet

as-path-filter is used to match the AS-PATH attribute in BGP routing information, so it can only be used to filter BGP routes

232. Which of the following descriptions about roaming group servers is wrong?

After the AC is set as the roaming group server, it will join the roaming group by default and can manage other ACs

One AC can serve as roaming group server for multiple roaming groups at the same time

The roaming group server needs to maintain the member table of the roaming group

The roaming group server manages each AC through the CAPWAP tunnel

233. The AS border router can be an internal router R or an ABR, and must belong to the backbone area.

TRUE

FALSE

234. Which of the following description of OSPF neighbor relationship and adjacency relationship is correct?

The adjacency relationship is maintained by OSPF DD packets

OSPF routers must establish an adjacency before exchanging Hello packets

The neighbor relationship is selected from the adjacency relationship and formed to exchange routing information

Not all neighbor relationships can be adjacencies

235. As shown in the figure, the management VLAN of the LAN is VLAN 10, the AP obtains an IP address through DHCP, and the network segment is 10.1.1.0/24 AP, AC and AR are DHCP client, DHCP relay device and DHCP server respectively.

Which of the following is correct about the configuration of the DHCP relay device and the DHCP server? (Multiple choice)

[AC] dhcp server group AP [AC-dhcp-server-group-AP] dhcp-server 172.21.1.2 [AC-dhcp-server-group-AP] quit [AC] interface Vlanif 10 [AC-Vlanif10] dhcp select relay [AC-Vlanif10] dhcp relay server-select AP [AC-Vlanif10] quits

[AR] ip pool AP [AR-ip-pool-AP] network 172.21.1.0 mask 24 [AR-ip-pool-APJ gateway-list 172.21.1.2 [AR-ip-pool-AP] excluded-ip-address 172.21.1.1 [AR-ip-pool-AP] quit [AR] interface GigabitEthernet 0/0/1 [AR-GigabitEthernet0/0/1] dhcp select global [AR-GigabitEthernet0/0/1] quit [AR]ip route-static 10.1.1.0 255.255.255.0 172.21.1.1

[Ac]dhcp server group AP [AC-dhcp-server-group-AP] dhep-server 10.1.1.2 [AC-dhcp server group-AP] quit [AC] interface Vlanif 10 [AC-V1anif10] dhcp select relay [AC-Vlanif10] dhcp relay server-select AP [AC-Vlanif10] said

[AR] ip pool AP [AR-ip pool-AP] network10.1.1.0 mask 24 [AR-ip-pool-AP] gateway-list 10.1.1.2 [AR-ip-pool-AP] excluded ip-address 10.1.1.1 [AR-ip-pool-AP] quit [AR] interface GigabitEthernet 0/0/1 [AR-GigabitEthernet0/0/1] dhcp select global [AR-Gigabi tEthernet0/0/1] quit [AR] ip route-static 10.1.1.0 255.255.255.0 172.21. 1.1

236. Which of the following reasons may cause the failure to establish a BGP neighbor relationship? (Multiple choice)

Neighbor configuration information is wrong

IP route unreachable

Fiber optic cable break

Disable TCP179 port number

237. When the service is configured as VLANPoo1, if the user fails to obtain an IP address within a certain period of time and the dhcp update vlan assignnentthreshold command is configured, VLANPoo1 will be triggered to assign a new VLAN to the user, so that the user can obtain an IP again in the new VLAN address.

TRUE

FALSE

238. Which of the following description about AS_PATH is wrong?

When there are two or more routes to the same destination in the router, these routes can compare the advantages and disadvantages of each other through this attribute, and the path with the longer AS_ PATHA is super-priority

AS_PATH refers to the list of ASs experienced by BGP routes in the transmitted path

BGP will not accept the route that contains this AS Number in the AS_PATH property

AS_PATH is a recognized mandatory attribute in BGP

239. In the IS-IS broadcast network, which multicast MAC address does the Level-2 router use as the destination address for sending lH?

0180-c200-0016

0180-c200-0014

0180-c200-0015

0100-5E00-0002

240. The following is part of the output information of the router RTD. Which of the following description of the output information is wrong?

display igmp-snooping IGMP Snooping Information for VLAN 3

IGMP Snooping is Enabled

IGMP IP Version is Set to default 2

IGMP Query Interval is Set to default 60

IGMP Max Response Interral is Set to default 10

IGMP Robustress is Set o default 2

IGMP Lase Weniber Query Interval is Set to defauit 1

IGMP Router Port Aging Interval is Set to 180s or holdtime in hello

The version of the IGMP message that can be processed in VLAN3 is the default value

The display igmp-snooping command is used to view the IGMP Sooping configuration information on the VLAN

The maximum response time of IGMP in VLAN3 is the default value, which is 60 seconds

IGMP Snoping of VLAN3 is enabled

Page 25 of 29

241. What are the benefits of OSPF area division? (Multiple choice)

Routers in an area can learn topology details outside their area

Can reduce the size of LSDB and thus reduce the consumption of router memory

LSA can also be reduced with the division of areas, reducing the consumption of router CPU

Mass flooding of LSAs is limited to a single area

242. The command to configure VRRP to track the status of the physical interface is:

track vrrp vrid 1 interface Gigabitethernet0/0/0

vrrp vrid 1 interface Gigabitethernet0/0/0

vrrp vrid 1 track interface Gigabitethernet0/0/0

vrrp vrid 1 interface Gigabitethernet0/0/0 track

243. The following is the BGP information output by the router. Which of the description of this information is wrong?

The Router ID of the router is 1.1.1.9

Use the display bgp network command to display the routing information of BGP advertised through the BGP network

The AS number of the router is 10

The router has introduced the network segment of 4.4.4.0/24 through the import-route command

244. As shown in the figure, the ISIS neighbor relationship between R1 and R2 has just been established, and the database synchronization process between R1 and R2 is correct?

The packet sent by R1 to R2 is a Hello packet.

The packet sent by R1 to R2 is an LSP packet.

The packet sent by R1 to R2 is a PSNP packet.

The packet sent by R1 to R2 is a CSNP packet.

245. After the stack is split, the party that loses the MAD election will be in the ( ) state. (The first letter is capitalized)

246. After the project delivery is completed, operation and maintenance costs will continue to be incurred. Which of the following items belong to the costs incurred during the operation and maintenance period? (Multiple choice)

Energy costs

Route suggestion fee

Line rental charges

Equipment depreciation expense

Personnel costs

247. Which of the following statements about stack splitting is wrong?

If the master switch is in two stack systems after the stack is split, the stack system where the original master switch is located updates the topology and re-designates the master switch.

After the stack splits, the MAC addresses of the two stack systems will change immediately

After splitting, multiple stack systems will have the same IP address and MAC address. In order to avoid network failures, the stack will perform MAD detection. The party that fails the MAD detection competition will close all physical ports except reserved ports.

If the master and backup switches are still in the same stack system after the stack splits, the slave switch separated from the original master and backup switches will re-elect the master and backup switches due to the timeout of the protocol message

248. Which of the following descriptions about the firewall is wrong?

Because routers can also use ACLs, routers can replace packet filtering firewalls

The three-layer firewall is the same as the router, and the data packets need to be forwarded through the routing table

Traditional packet filtering firewalls are difficult to adapt to dynamic security requirements

The firewall has an SPU module, which is used to realize the security function of the firewall

249. Which of the following is the most effective way to view device alarms through CL?

display interface brief

display current-configuration

display alarm

display clock

250. IPv6 address 2001:0DB8:000A:C030:0000:0000:09A0: CDEF is ______ after compression. (If there are letters in the answer, please use uppercase format)

Page 26 of 29

251. Which of the following characteristics meet the following conditions. A BCP router may not support these attributes, but it will still receive such attributes and pass them on to other peers. (Multiple choice)

Commmnity

Ageregator

Multi_Exit_Disc

Local_Pref

252. Which of the following is the multicast destination address of the Hello message in PIM?

224.0.0.9

224.0.0.13

224.0.0.5

224.0.0.21

253. Which of the following statements about different types of firewalls is wrong?

A stateful inspection firewall needs to be configured with security policies for the "go" and "return" directions of packets

Packet filtering firewall for each data packet passing through the firewall, an ACL matching check is performed

Proxy firewall acts as a proxy for business between internal network and external network users

The state inspection firewall only checks the security policy for the first packet that does not hit the session

254. What is the minimum total length of the address in IS-IS Byte?

255. If the two interfaces of the fire protection block are divided into the same area, then the data packets flowing between the two interfaces do not need to be processed by packet filtering and are directly forwarded.

TRUE

FALSE

256. Routes injected into BGP by redistribution command, whose Origin attribute is Incomplete.

True

False

257. The statement about OSPF AS-External-LSA, which is correct? (Multiple choice)

Net mask is set to all 0

Link State ID is set as the destination network segment address

Advertising Router is set to the Router ID of ASBR

Use Link State ID and Advertising Router to uniquely identify an AS-External-LSA

258. Which of the following statements about the address used by AC to establish a CAPWAP tunnel in VRRP hot backup is correct?

The physical address of the primary AC

The physical address of the standby MC

Any address configured in the AC is fine

VRRP virtual addresses of the active and standby ACs

259. The function of routing protocol priority is to assign different priorities to routes discovered by different protocols, so that when a router learns the same route from different routing protocols at the same time, it can have a selection priority.

True

False

260. Route import can realize communication between different protocols. Which of the following issues should be paid attention to when configuring route import? (Multiple choice)

Routing backfill

Routing priority

Route convergence time

Routing Metrics

Page 27 of 29

261. A BGP router can send incremental BGP routing updates or perform periodic updates.

TRUE

FALSE

262. The following is part of the output information of the router Huawei. Regarding the output information, the wrong description is:

The router gigabitethernet 1/0/0 interface runs PIM-SM

The PIM status of the router gigabitethernet 1/0/0 interface is UP

The router gigabitethernet 1/0/0 interface runs PIMv2

The DR on this interface is 10.1.1.1

263. Which part of the multicast network architecture is the IGMP protocol applied to?

The entire multicast network

Source network

Multicast forwarding network

Member side network

264. A switch will join the stack system, so the stack ID is manually configured to be 2 in advance, but after joining the stack system, the stack system assigns the stack ID to the switch to be 3 , and the GE0/0/2 interface of the switch is added to the stack system The interface number is GE___ .

265. Please match the following BGP-recognized community attribute names with their corresponding functions.

266. Use the default-route-advertise command in OSPF to advertise the default route to the common OSPF area. When there is no default route in the area, use ____ to force the advertisement. (Please fill in lowercase English)

267. In the OSPF routing protocol, the unit of the bandwidth-reference command is Mbps.

True

False

268. Which of the following protocols can generate a multicast distribution tree?

IGMPv2

PIMv2

BGP

OSPF

269. The BFD version number supported by the VRP version is:

version 3

Version 2

Version 1

Version 4

270. When two devices with the same priority compete for the Master role at the same time, the device with the interface with the smaller IP address should be selected as the Master device.

True

False

Page 28 of 29

271. A medium-sized park network manages the network through the SNMP protocol. Which version of SNMP does the park manage?

All versions are available

SNMPv1

SNMPv2C

SNMPv3

272. Which of the following statements about the BGP notification principle is wrong?

Routes obtained from IBGP peers can only be sent to IBGP peers

When a router learns a BGP route from its own IBGP peer, it cannot use this route or advertise this route to its own EBGP peer unless it learns this route from the IGF protocol route

The route obtained from the EBGP peer will be advertised to all peers

Only publish the optimal route

273. If you want to realize communication between different protocols, you can only use the method of routing import.

TRUE

FALSE

274. When there are two ACs and multiple APs in the WLAN network, the network configuration of active and standby mode is to plan half of the APs to be AC1 as the main AC and AC2 as the backup AC, and the other half of the APs to plan AC2 as the main AC and AC1 as the backup AC, thereby improving the utilization of AC resources.

TURE

FLASE

275. The network administrator checks the BGP neighbor information on a router, and the neighbor information is shown in the figure. Which of the following statements about this information is correct? (Multiple choice)

The router has not received a BGP route prefix from the peer

The Router ID of the local router is 1.1.1.1

The number of messages received and sent by the peer 3.3.33 is 10 and 20 respectively

The neighbor relationship with peer 3.3.3.3 is an IBGP peer

276. Among the following BGP attributes, which ones are recognized and must be followed? (Multiple choice)

Next hop

AS_Path

origin

Community

Local_Pref

277. Which of the following descriptions about the OSPF protocol are correct? (Multiple choice)

The cost value of the second type of external route is only the AS external cost value, ignoring the AS internal cost value

AS-External-LSA does not belong to any area

AS-External-LSA describes the flooding scope of the route to the AS external route is outside the AS

AS-External-LSA describes the path from the router to the ASBR

278. If the transformation of the network in the project will affect the business running on the existing network, then the implementer needs to formulate strict implementation process specifications and risk avoidance measures. We generally define such projects as cutover projects.

TRUE

FALSE

279. What are the main components of the SNAP address used by the IS-IS protocol? (Multiple choice)

SEL

DSCP

SYSTEM ID

280. The Stub area and Totally Stub area of OSPF solve the problem caused by maintaining an excessively large LSDB in the end area, but they are not the best solution for some specific scenarios.

TRUE

FALSE

Page 29 of 29

281. The IGMP protocol runs between an IP host and its directly connected multicast router to maintain multicast group membership.

True

False

282. Trunk ports can allow multiple VLANs to pass through, including VLAN4096.

True

False

283. Intranet users of a company use the No-pat method of NAT to access the Internet. If all public IP addresses are used, what will happen to intranet users who access the Internet later?

Squeeze out the previous user and force NAT conversion to access the Internet

Synchronize the message to other NAT conversion equipment for NAT conversion

Automatically switch NAT to PAT and go online

Subsequent intranet users will not be able to access the Internet

284. Regarding the following dual-link hot standby configuration, when configuring the priority of the AC, the greater the value of the priority, the higher the actual priority of the AC.

True

False

285. Type 7 LSAs are generally not allowed to be transmitted in the backbone area, but the suppress-forwarding-address command can be used to allow Type 7 LSAs to be transmitted in Area 0.

TRUE

FALSE

286. Multiple BGP processes cannot be configured on a router.

True

False

287. In WLAN networking, which of the following backup technologies has the lowest cost and the slowest switching speed?

Dual-link cold backup

Dual link hot standby

N+1 backup

VRRP dual-machine hot standby

288. In a network environment, there are both switches running RSTP and switches running SIP, then the phenomenon that will appear in this network is: (Multiple choice)

If it is a Huawei switching device, RSTP will switch to STP mode. After the STP switching device is withdrawn from the network, the RSTP -running switching device can migrate back to the RSTP working mode

RSTP can interoperate with STP, but at this time RSTP advantages such as fast convergence are lost

RSTP and STP are not interoperable and will perform independent operations

If it is a Huawei switching device, the STP will switch to RSTP mode, and the switching device running RSTP can be configured to switch back to the RSTP working mode after the switching device is removed from the network.

289. Which of the following descriptions about configuring the dual-machine hot backup function in the WLAN network is wrong?

When dual-link hot backup is switched over, due to the long switching time, the business data forwarded by the tunnel will be interrupted during this period, and new users will not be able to go online, and the online users will not be able to roam.

When configuring dual-link hot backup, after the active AC completes the service configuration, execute the commit command to send the configuration to the AP, and then complete the configuration of the standby AC

When configuring dual-link backup, you need to use the commit command on the active AC to send the configuration to the AP after the active and standby ACs have completed the service configuration.

290. To configure OSPF area 10 as a Totally NSSA area, the command to be configured is:

[Huawei]ospf 1

[Huawei-ospf-1]area 10

[Huawei-ospf-1-area-0.0.0.10]nssa_______

(Please fill in lowercase English, no spaces, and use correct symbols)

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