Valid H12-831_V1.0-ENU Exam Dumps are Your best Choice to Pass

1. In the network shown in the figure, R1 and R2 are connected through SW1. If STP is not enabled on SW1, R1 and R2 cannot ping each other.

2. What types of LSAs must a router running OSPFv3 generate? (Multiple choice)

3. In the network shown in the figure, the network engineer found that the path between PC1 and PC2 is not the optimal path, and the cost value of each link is the same. Based on this analysis, which of the following priorities may the switch have?

4. As shown in the OSPF network, the area number has been marked in the figure, where Area 1, Area 2, and Area 3 are all common areas. The IP address of the R5 Loopback0 interface is 10.0.5.5/32, and the interface enables OSPF through the network method.





On the GE0/0/1 interface of R5 and the GE0/0/2 interface of R1, "ospf filter-Isa-out all" is configured. Which of the following routers' routing tables do not contain a route entry for 10.0.5.5/32? (Multiple choice)

5. In the IS-IS network shown in the figure, R1 introduces the default route through the "default-route-advertise always level-1" command. Which of the following descriptions is wrong?

6. When new features are added or the original performance needs to be optimized, or when problems with the current running version need to be solved, the device needs to be upgraded. At this time, a higher version of the system software needs to be loaded and the device needs to be restarted to achieve this. Huawei NetEngine AR series devices use the same software package, such as AR6120, AR6280, and AR6000V.

7. An enterprise service route is transmitted in the network, and the partial configuration of PE1 and PE2 is shown in the figure. In this scenario, which of the following types of LSAs may CE2 receive? (Multiple choice)

8. When the switch is configured with the port isolation function, by default, different hosts belonging to the same VLAN cannot communicate at Layer 2 and Layer 3.

9. BGP's prefix-based ORF (Outbound Route Filtering) capability can send the prefix-based ingress policy configured on the local device to the BGP neighbor through the route refresh message. The BGP neighbor constructs the egress policy based on these policies and filters the routes when they are sent. Compared with configuring the routing policy on the BGP neighbor, this method not only avoids the local device from receiving a large number of useless routes, reduces the CPU usage of the local device, but also effectively reduces the configuration work of the local device.

10. When IP packets pass through the WPLS network, the WPLS device will process the TTL. If the topology uses the uniform processing mode as shown in the figure, please match the TTL values during the packet transmission process one by one.

11. OSPF supports equal-cost load balancing. When the number of equal-cost routes in the network is greater than the number of equal-cost routes configured by the maximum load-balancing command, if the routes have the same priority, load balancing selects the route with a larger interface index.

12. In the OSPFv3 network shown in the figure, area 1 is a stub area, area 2 is a common area, and area 3 is an NSSA area. The IPv6 address of the R5 Lopback0 interface is 2000::5/128, which is introduced into OSPFv3 through import. The Router ID of each device is 10.0.X.X, where X is the device number.





Which of the following descriptions are correct? (Multiple choice)

13. The network logical architecture of a cutover project is shown in the figure . The purpose of the cutover is to enable terminals located in different geographical locations to access each other, and the terminal gateway is deployed on the PE.





After the cutover is completed, which of the following methods can network engineers use to preliminarily determine whether the network connectivity is normal? (Multiple choice)

14. In order to protect the BGP protocol from attacks, MDS authentication can be used between BGP neighbors to reduce the possibility of attacks. The ID5 algorithm is simple to configure. After configuration, a single password is generated, and human intervention is required to change the password.

15. An enterprise network deploys the MUX VLAN function to control the Layer 2 communication between employees and guests. Which of the following descriptions are correct about the scenario shown in the figure? (Multiple choice)

16. Use the "display version | begin uptime" command on the router, and the first word in the output information is "uptime"

17. In the network shown in the figure, OSPF protocol is deployed between R2 and R1, and OSPF protocol is also enabled on GE0/0/1 interface of R2. IS-IS protocol is deployed between R2 and R3. In order for R1 to obtain the route to 10.0.3.3/32, IS-IS route is introduced into OSPF route on R2. Then, in the routing table of R1, the next hop address to 10.0.3.3/32 is ().

18. The MPLS architecture is divided into the control plane and the forwarding plane. The figure shows the relationship between various protocols and table entries. Please fill in the protocols and table entries in the corresponding positions.

19. In a BGP/MPLS IP VPN network, the configuration of some PE options is to update VPN routes through Update messages. Which of the following information will be included in the Update message? (Multiple choice)

20. In the network shown in the figure, R1, R2, R4, and R5 run IS-IS, and the area number is 49.0001. R3 and R6 run IS-IS, and the area number is 49.0002. Inside AS65000, R1, R3, R4, and R6 all establish IBGP neighbor relationships with R2 and R5, of which R2 and R5 are RRs and R1, R4, R3, and R6 are clients. IBGP neighbor relationships are all established using the Loopback0 interface. The IP address of the Loopback0 interface of each device is 10.0.X.X/32, and the Router ID is 10.0.XX, where X is the device number. R1 and R4 introduce the external network 192.168.1.0/24 into BGP through the import method, and R3 and R6 introduce the external network 192.168.2.0/24 into BGP through the import method.





By default, which of the following descriptions are correct? (Multiple choice)

21. Based on the locally maintained LSDB, the device running the OSPF protocol calculates the shortest path tree with itself as the root through the SPF algorithm, and determines the next hop to the destination network based on this shortest path tree. If the network changes frequently, the maximum interval of the SPF calculation can be set to 0 to increase the speed of route convergence.

22. In a BGP/MPLS IP VPN network, when which of the following routing protocols is running between CE and PE, the device can perform route redistribution operations without BGP?

23. IPSG is a source IP address filtering technology based on the three-layer interface. It can prevent malicious hosts from forging the IP addresses of legitimate hosts to impersonate legitimate hosts to access legitimate network resources.

24. Which of the following reasons will cause Telnet login failure of network devices? (Multiple choice)

25. The Router ID of R4 is 10.0.4.4. In the LSDB of R4, the LSA shown in the figure is seen. The network engineer makes the following inferences based on the LSA. Which one is wrong?

26. In a certain MPLS network, the LSP information of R1 and R2 is shown in the figure. At this time, the administrator enters the command ping3.3.3 on R1. Which of the following descriptions of this scenario is correct?

27. A network device has established an OSPF neighbor relationship. The configuration of its GE0/0/0 interface is shown in the figure. Which of the following commands executed on this interface will not affect the OSPF neighbor status of this interface? (Multiple choice)

28. MPLS supports multi-layer label nesting. When the device receives an MPLS message, it will first process the label close to the second-layer header, that is, the MPLS label at the top of the stack.

29. The equipment operating environment refers to the external environment such as the equipment room, power supply, and heat dissipation where the equipment operates. This is the basic condition for the equipment to operate. For the maintenance of the equipment operating environment, the staff can only complete it by visiting the site in person.

30. The debug output information of an OSPF router is shown in the figure. Which of the following is the router ID of this router?

31. In the network shown in the figure, adjacent routers use directly connected interfaces to establish EBGP neighbor relationships. The AS number is 6500X , where X is the router number. R1 and R4 both have static routes to 192.168.1.0/24, which are introduced into BGP through import. By default, in the R3 routing table, the AS_Path attribute carried by the route entry to 192.168.1.0/24 is which of the following?

32. In the IS-IS IPv6 network shown in the figure, all routers have multi-topology enabled. The IPv6 address of the R4 Loopback0 interface is 2000::4/128. Configure "ipv6 summary 2000::64 level-2" in the R2 and R1 IS-IS processes. Configure "ipv6 import-route isis level-2 into level-1" in the R1, R2, and R3 IS-IS processes.





By default, which of the following routers have a route entry for 2000::/64 in their routing table?

33. The MPLS architecture is divided into a control plane and a forwarding plane, which contains multiple protocols and tables. Which of the following tables is responsible for forwarding packets with MPLS labels?

34. As shown in the figure, S73 is the user gateway and DHCP Relay in the network. The administrator plans to deploy the DHCP Snooping function on S73 to prevent DHCP attacks. Which of the following commands does not need to be configured on ST3?

35. In an MPLS network, an LSR ID is used to uniquely identify an LSR (Label Switching Router). The LSR ID defaults to the IP address of a physical interface of the device and can be manually configured as the loopback interface address.

36. When Huawei NetEngine AR series router logs in to FTP server as FTP client (all permissions are enabled on FTP server), which of the following operations can be performed? (Multiple choice)

37. An enterprise network is shown in the figure. If CE2 is dual-owned by PE2 and PE3, a Type 5 LSA routing loop may occur. The loop can be prevented by setting the route-tag command on PE2 and PE3 devices. When the Route Tag of the route received by PE3 is the same as the local configuration, the route will be ignored.

38. In the network shown in the figure, R1 and R2 cannot establish an EBGP neighbor relationship through the direct connection interface. The network engineer first checked the BGP-related configurations of R1 and R2, and determined that the reason why R1 and R2 cannot establish an EBGP neighbor relationship is that the Keepalive and Hold parameters do not match.

39. As shown in the figure, RIR4 is one of the four routers in AS 123. They all run OSPE and realize the routing interconnection within the AS. Among them, the two network segments 10.1.1.0/24 and 10.4.4.0/24 are not published to OSPF. Now, R1 and R4 have established an IBGP peer relationship based on the Loopback0 interface, and published the network segments 10.1.1.0/24 and 10.4.4.0/24 to BGP respectively.





Which of the following methods can enable PC1 and PC2 to communicate with each other? (Multiple choice)

40. When executing a cutover project, network engineers can perform remote operations at the customer's network maintenance center and guide on-site construction personnel to complete hardware-related operations, such as powering on equipment and connecting equipment.

41. MP-BGP adds a new path attribute MP_REACH_NLRI to publish VPNv4 routing information or withdraw unreachable routes in BGP/MPLS IP VPN networks

42. If the technical migration actions performed on the network will affect the existing network operations, the pre-set operating procedures and risk control measures must be strictly followed when implementing the technical migration project. Such projects are generally defined as cutover projects.

Which of the following operations performed in the existing network is a non-cutover item?

43. When there are multiple redundant links in the IS-IS network, multiple equal-cost routes may appear. For a certain route among the equal-cost routes, the network administrator can adjust its priority through the "nexthop xxxx weight value" command. The smaller the value, the higher the priority.

44. In the OSPF network shown in the figure, area 1 is the MS5A area, area 2 is the Stub area, and R4 imports the external route 10.0.4.4/32. The Router ID of each device is 10.0.XX, where X is the device number. The "asbr-summary 10.0.4.0 255.255.255.0" command is configured in the OSPF process of R1 and R3. Please match the route entries in the following routing table with the routers.

45. As shown in the figure, the VRRP virtual IP address of network R1 and R2 is configured as 10.0.12.254. After the configuration is completed, the network engineer checks the VRRP status on R1 and R2. Both devices are in the Master state. Which of the following will not cause this phenomenon?

46. In the OSPFv3 network shown in the figure, there are _______ Link-LSAs in R1's LSDB.

47. The administrator uses the display mpls lsp command to view the LSP of the device. The output information is shown in the figure. Which of the following descriptions of the information is correct?

48. In the network shown in the figure, adjacent routers use directly connected interfaces to establish EBGP neighbor relationships. The AS number is 6500X, where X is the router number. R1 and R4 both have static routes to 192.168.1.0/24, which are introduced into BGP through import. The maximum number of equal-cost routes configured for EBGP load sharing on R3 is 8.





By default, the number of equal-cost routes from R3 to 192.168.1.0/24 is which of the following?

49. In the network shown in the figure, OSPF protocol is run between R1, R2, and R3. IBGP neighbor relationship is established between R1 and R3 using loopback interface. If OSPF is shut down on R2's GE0/0/1 interface through "undo network xxxx yyyy" command, and BGP neighbor relationship is checked on R1, by default, the longest time for R1 BGP neighbor relationship to change from Up state to Dom state is which of the following?

50. When the hardware of a network device fails, you can usually use the replacement method, such as replacing the optical module, replacing the board, replacing the power module, etc. When performing the above operations, you need to wear an anti-static wrist strap.

51. As shown in the figure, when a network engineer is troubleshooting, he draws a schematic diagram of a multicast network. The IGIP version enabled by R1 and R2 is 2, PIM-SM is used as the multicast routing protocol, and other configurations are default configurations. The querier in the multicast network is ().

52. Which of the following reasons may cause the local device to be unable to learn the ARP information of the other device? (Multiple choice)

53. In the OSPFv3 network shown in the figure, the OSPFv3 related parameters are the default configuration. When checking the LSDB on one of the devices, some content is omitted in the LSDB. The Router IDs of R1, R3, and R4 are 10.0.1.1, 10.0.3.3, and 10.0.4, respectively. The Origin Router part of some LSAs is hidden. Please complete this part.

54. The OSPF protocol requires routers in the same area to save the same link state database LSDB. As the number of routes on the network continues to increase, some routers cannot carry so much routing information due to limited system resources. This state is called database overload.

If all routers in an OSPE network are configured with "Isdb-overf1low-limit number 7", which of the following scenarios may cause the router to enter the Overflow state? (Multiple choice)

55. In the network shown in the figure, OSPF is deployed between R2 and R1, and OSPF is also enabled on R2's GE0/0/1 interface. IS-IS is deployed between R2 and R3. In order for R1 to obtain the route to 10.0.3.3/32, IS-IS routes are introduced into OSPF routes on R2. The FA address in the Type5 LSA generated by R2 is ().

56. When there are multiple equal-cost routes to the same destination address, BGP equal-cost load balancing can be used to achieve the purpose of balancing traffic. However, IBGP routes and EBG routes to the same destination in the public network cannot form load balancing.

57. The R2 device has the file information shown in the figure. When the network engineer uses the "dir|include4" command to view the file information, which of the following files will be seen? (Multiple choice)

58. In the network shown in the figure, the OSPF protocol is deployed between R2 and R1, and the IS-IS protocol is deployed between R2 and R3. In order for R1 to obtain the route to 10.0.3.3/32, the IS-IS route is introduced into the OSPF route on R2. The FA address in the Type5 LSA generated by R2 is ().

59. In a networking environment where the network is relatively stable and has high requirements for routing convergence time, you can specify the OSPF LSA reception time interval to 0 to cancel the LSA reception time interval, so that topology or routing changes can be immediately perceived, thereby accelerating routing convergence.

60. In the network shown in the figure, adjacent routers use directly connected interfaces to establish EBGP neighbor relationships. The Router ID of each device is 10.0.XX, and the AS number is 6500X, where X is the router number. R1 and R4 both have static routes to 192.168.1.0/24, which are introduced into BGP through import.





If the "ageregate 192.168.1.016 detail-suppresed command" is configured on R1, which of the following is the traffic path from R3 to 192.168.1.0/24?

61. In the network shown in the figure, R1, R2, R4, and R5 run IS-IS, and the area number is 49.0001. R3 and R6 run IS-IS, and the area number is 49.0002. Within AS 65000, R1, R3, R4, and R6 all establish IBGP neighbor relationships with R2 and R5, where R2 and R5 are RRs and R1, R4, R3, and R6 are clients. IBGP neighbor relationships are all established using the Loopback0 interface. R2 and R5 also establish an IBG neighbor relationship. The IP address of the Loopback0 interface of each device is 10.0.X.X/32, and the Router ID is 10.0.XX, where X is the device number. R1 and R4 introduce the external network 192.168.0/24 into BGP through import.





For 192.168.1.0/24, match the number of valid routes in the display bgp routing-table output.

62. In the BGP/MPLS IP VPN network shown in the figure, which of the following RT value plans can enable Site 1 and Site 2 to communicate with Site 3? (Multiple choice)

63. As shown in the figure, VLAN aggregation function is deployed in a switching network, in which Sub-VLAN 10 and Sub-VLAN 20 are both added to Super-VLAN 100.





which of the following descriptions are correct for the communication between PCs in this scenario? (Multiple choice)

64. The network and VPN planning of a certain enterprise is shown in the figure. Please match the sites through which business traffic can communicate one by one.

65. An enterprise network is shown in the figure. If CE2 is dual-owned by PE2 and PE3, a Type 3 LSA routing loop may occur. The loop can be prevented by setting the dn-bit-set disable command on PE2 and PE3 devices.

66. In the OSPF network shown in the figure, R1 and R2 are connected by four links. OSPF is enabled on the Loopback0 interface of R2. The "maximum load-balancing 3" command is configured in the OSPF process of R1. Which of the following is the outbound interface from R1 to the Loopback0 interface of R2?

67. A network engineer discovered that a link failure alarm frequently appeared on the interface of a certain device. The interface is an Ethernet optical port. Which of the following commands can the network engineer use to check the transmit and receive optical power of the interface?

68. In the IS-IS network shown in the figure, R1 introduces the default route through the "default-route-advertise always level-1" command. Which of the following routers have a default route in their routing table? (Multiple choice)

69. In a networking environment where the network is relatively stable and has high requirements for route convergence time, you can specify the OSPF LSA update interval to 0 to cancel the LSA update interval, so that topology or route changes can be immediately published to the network through LSA, thereby speeding up the route convergence speed in the network.

70. The network administrator has deployed the IPSG function on the switch to prevent IP address spoofing attacks. Among the device interfaces shown in the figure, which interfaces will not perform IPSG checks after receiving packets? (Multiple choice)

71. The MPLS label is a 20-bit local identifier. When the administrator configures a static LSP, the incoming label and outgoing label can be manually specified. The value range is 0~1048575.

72. In the OSPFv3 network shown in the figure, area 1 is a normal area. Which of the following descriptions are correct? (Multiple choice)

73. Generally, large-scale and important cutover projects require setting up an environment in the laboratory for advance verification, which is called laboratory testing. Successful laboratory testing means that the cutover plan is feasible and there is no need to meet with the customer for review.

74. In the OSPFv3 network shown in the figure, OSPFv3 is enabled on the interconnected ports of R1, R2, and R3, and all are configured with IPv6 global unicast addresses. Then R1, R2, and R3 will all generate Intra-Area-Prefix-LSA.

75. The linkage between OSPF and BFD is to associate BFD and OSPF protocols to speed up the response of OSPF protocol to network topology changes. After BFD status 3 is UP, the OSPF neighbor status can reach the Full status. After the BFD status changes to Down, the OSPF neighbor status can change to Down.

76. In the enterprise network shown in the figure, R3 is connected to the enterprise network management server, and all devices in the network communicate with the network management server through VPN.





During the inspection, it was found that R3 had redundant RT configurations. Which of the following commands can be executed on R3 to delete the redundant RTs without affecting the connectivity of all devices and the network management server? (Multiple choice)

77. In the network shown in the figure, R1 and R2 are configured with single-hop BFD detection. The network engineer found that the BFD session was Down, so he queried the configuration related to R1 and R2 BD. The configuration information has been marked in the figure. According to the configuration information, the reason for the BFD session Down is that the time parameters configured on R1 and R2 do not match.

78. In an IPLS network, when an LSR (Label Switching Router) receives a Hello message from the other end, it will establish an LDP adjacency relationship, in which the Hello message will be sent in multicast or unicast form.

79. In the Hub&Spoke network shown in the figure, in order to achieve correct routing transmission, the administrator must manually configure which of the following commands on the Hub-PE?

80. With the increase of business traffic, an enterprise needs to expand the dedicated transmission bandwidth of the backbone network. Which of the following methods can best meet this demand?

81. In the CE multi-homing scenario, if the PE enables the BGP AS number replacement function, you can also configure the Soo feature to avoid loops, that is, enable this feature through the peer soo command on the EBGP peers between PE and CE.

82. MPLS needs to assign labels to messages in advance and establish an LSP before it can forward messages. LSP is divided into static LSP and dynamic LSP. Which of the following protocols can be used to establish a dynamic LSP? (Multiple choice)

83. OSPF supports equal-cost load balancing. When the number of equal-cost routes in the network is greater than the number of equal-cost routes configured by the maximum load-balancing command, if the interface priority and interface index are the same, load balancing selects the route with a smaller next-hop IP address.

84. In the OSPFv3 network shown in the figure, area 1 is the Totally Stub area, area 2 is the normal area, and area 3 is the Totally NSSA area. The IPv6 address of the R6 Lopback0 interface is 2000::6/128. The Router ID of each device is 10.0.XX, where X is the device number.





When all links are normal, which of the following descriptions are correct by default? (Multiple choice)

85. A message with a destination IP address of 4.4.4.4 forwarded by R1 is transmitted in an MPLS network. Part of the LSP information of R3 is shown in the figure. Which of the following devices will perform MPLS label operations during the transmission of the message? (Multiple choice)

86. The route reflector and its clients form a cluster, using the unique Cluster ID in the AS as an identifier. When a route is reflected by the RR for the first time, if there is no Cluster_List attribute, the RR will add the local Cluster ID to the front of the Cluster_List. If a route already has the Cluster_List attribute, the RR will no longer modify the Cluster_List attribute.

87. The network administrator deploys the IPSG function on the access switch to prevent IP address spoofing attacks. Then he needs to enable the IP packet inspection function in the interface view or () view of the switch.

88. Which of the following descriptions about OSPFv3 are correct? (Multiple choice)

89. In the OSPF network shown in the figure, the link cost value has been marked in the figure, R1 enables OSPF IP FRR, then which of the following descriptions is wrong?

90. When the administrator statically configures the Ingress node of LSP, it is recommended to establish a static LSP by specifying the next hop to ensure that there is a routing entry in the local routing table that exactly matches the specified destination IP address.

91. In an HPLS network, when a transit device receives an MPLS message and prepares to perform label switching, it finds that the label value after switching is 0. Which of the following operations will it perform?

92. When the administrator enables the MPLS LDP function of the device, which of the following commands must be configured first?

93. In an MPLS network that uses LDP to establish LSP, when the directly connected downstream transit node of the ingress node that sends a label request will distribute labels to the ingress only after receiving the label mapping message from the final downstream egress node, which of the following combinations of label publishing mode and label distribution control mode is used at this time?

94. In the network shown in the figure, IS-IS IPv6 runs between R2, R6, and R3, and the IPv6 address of R6 Looback0 interface is 2000::6/128. Other links run OSPFv3, area 1 is a Stub area, and area 2 is an NSSA area.





IS-IS routes are imported into OSPFv3 on R2 and R3. Which of the following descriptions are wrong? (Multiple choice)

95. There are many types of MAC address entries on the switch. Which of the following types are manually configured by the user and cannot be aged? (Multiple choice)

96. In the network shown in the figure, R1, R2, R4, and R5 run IS-IS in area 49.0001, and R3 and R6 run IS-IS in area 49.0002. "iport-route isis level-2 into level-1" is configured on R2. Within AS 65000, R1, R3, R4, and R6 all establish IBGP neighbor relationships with R2 and R5, of which R2 and R5 are RRs, and R1, R4, R3, and R6 are clients. R2 and R5 also establish an IBGP neighbor relationship and configure the same Cluster ID. The IBGP neighbor relationship is established using the Loopback0 interface. The IP address of the Loopback0 interface of each device is 10.0.X.X/32, and the Router TD is 10.0.X.X, where X is the group number of the device. R1 and R4 import the external network 192.168.1.0/24 into BGP, and R3 and R6 import the external network 192.168.2.0/24 into BGP.





Which of the following descriptions are correct by default? (Multiple choice)

97. If an OSPF router is set as a stub router, which of the following is the link metric in the LSA sent by the router?

98. A BGP router receives a BGP route whose AS_Path attribute is "100200300".

If the router wants to reject this route, which of the following as-path-filters can it use? (Multiple choice)

99. The address family information field of MP_REACH_NLRI consists of a 2-byte address family identifier AFI and a 1-byte sub-address family identifier SAFI. When public IPv4 routes are transmitted under the BGP-IPv4 unicast address family, SAFI is 1. When public IPv6 routes are transmitted under the BGP- IPv6 unicast address family, SAFI is also 1.

100. When the basic QinQ function is configured on a port of the switch, only when a message with a VLAN Tag is received from the port will the message be tagged with the default VLAN of the port, thereby achieving the purpose of expanding the VLAN space.

101. In the OSPF network shown in the figure, the area numbers are marked in the figure. Area 1 is a stub area, area 2 is a totally stub area, and area 3 is an NSSA area. Which of the following types of LSAs will not appear in areas 1, 2, and 3?

102. After troubleshooting the problem, the network engineer wrote a troubleshooting report, in which he simplified the actual networking into the network shown in the figure.





In the faulty network, R1 and R2 both enable OSPF and serve as gateways for PC1 and PC2 respectively. Which of the following descriptions of the faulty network connectivity are correct? (Multiple choice)

103. The network logic architecture of a cutover project is shown in the figure. The purpose of the cutover is to expand a network device R4 between R2 and R3. The OSPF protocol runs between the network devices.





After the physical network is connected, when performing the cutover operation, the network engineer first mistakenly imports the backup configuration of R3 into R4. Based on this scenario, which of the following descriptions are correct? (Multiple choice)

104. In the OSPF network shown in the figure, area 1 is an NSSA area, area 2 is a common area, and R4 imports external route 10.0.4.4/32. The Router ID of each device is 10.0.0.X, where X is the device number.





The "asbr-summary 10.0.4.0 255.255.255.0" command is configured in the OSPF processes of R1 and R3. Which of the following routers have routing entries for 10.0.4.0/24 in their routing tables? (Multiple choice)

105. In the OSPP network shown in the figure, area 1 is a Totally NSSA area, area 2 is a common area, and R4 imports the external route 10.0.4.4/32. The Router ID of each device is 10.0.XX, where X is the device number.





in the OSPF processes of R1 and R3. Which of the following descriptions is correct?

106. As shown in the figure, the network administrator deploys the DHCP Snooping function on the switch to defend against attacks by DHCP Server impersonators. Which of the following interfaces should be set as a DHCP trusted interface?

107. In the network shown in the figure, adjacent routers use directly connected interfaces to establish EBGP neighbor relationships. The Router ID of each device is 10.0.XX, and the AS number is 6500x, where X is the router number. R1 and R4 both have static routes to 192.168.1.0/24, which are introduced into BGP through import.





By default, among the routes received by R6 regarding 192.168.1.0/24, which of the following has the longest AS_path?

108. When creating an IPv6 static route, for a point-to-point interface, the outbound interface must be specified. For a broadcast type interface, the next hop must be specified.

109. As shown in the figure, R1, R2, and R3 run WPLS, and the administrator configures a static LSP from the 1.1.1.0/24 network segment to the 3.3.3.0/24 network segment.





Which of the following descriptions of this scene are correct? (Multiple choice)

110. In the OSPF network shown in the figure, area 1 is an NSSA area, area 2 is a common area, and R4 imports the external route 10.0.4.4/32. The Router ID of each device is 10.0.XX, where X is the device number.





The "asbr-summary 10.0.4.0 255.255.255.0" command is configured in the OSPF processes of R1 and R3. Which of the following routers have a route entry for 10.0.4.0/24 in their routing tables? (Multiple choice)

111. As shown in the figure, CE1 sends VPN1 traffic to PE1. After receiving it, PE1 will forward the VPN traffic. Which of the following descriptions of this scenario are correct? (Multiple choice)

112. A certain enterprise network is shown in the figure, in which CE and PE communicate with each other by deploying EBGP. At this time, CE1 transmits a private network route to PE1.





what are the errors in the following analysis of this scenario? (Multiple choice)

113. In the IS-IS IPV6 network shown in the figure, all routers have multi-topology enabled. Configure "ipv6 default-route-advertise always level-1" in the IS-IS processes of R4 and R5.





By default, which of the following routers have a default route in their routing table? (Multiple choice)

114. In the network shown in the figure, the IP addresses planned for the interconnection interfaces of R1 and R2 have been marked in the figure, but R1 and R2 cannot be Pine connected. Therefore, the network engineer checked the configuration of the R1 and R2 interfaces and judged based on the configuration information that the wrong mask configuration of the R2 interface was the cause of the fault.

115. When dealing with a fault in the existing network, a network engineer drew a topology diagram as shown in the figure. All routers run OSPF. Which of the following descriptions about the access path between PC1 and PC2 is correct?

116. When the switch is configured with port isolation function, by default, different hosts belonging to the same VLAN cannot communicate at layer 1 and layer 3.