H12-311_V3.0-ENU Dumps Help You Study Objectives

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August 31, 2023

By practicing with H12-311_V3.0-ENU exam-like questions, you can identify areas where you may need to focus your studies. Huawei H12-311_V3.0-ENU dumps can help you create a more targeted study plan and avoid wasting time studying topics you already know well. Taking H12-311_V3.0-ENU dumps can help you get used to the format and structure of the real exam. H12-311_V3.0-ENU dumps can help you feel more comfortable and confident on exam day, which can improve your chances of success. Practice Huawei H12-311_V3.0-ENU exam free dumps below.

Page 1 of 15

1. What are the advantages of WLAN Mesh network compared to traditional wireless local area network? (Multiple choice)

Coverage limitations are broken

Reduce reliance on wired networks

Stronger wireless signal

The AP or AC that supports Mesh devices is more powerful

2. Which of the following protocols can support both the 2.4GHz frequency band and the 5GHz frequency band?

802.11a

802.11b

802.11g

802.11n

3. Which access authentication methods does the Agile Controller support? (Multiple choice)

802.1x authentication

Portal authentication

MAC authentication

RADIUS

4. The wireless users of the same user VLAN and the same SSID can access the Internet, but they cannot access each other. What may be the reason for this phenomenon?

ACL is configured on the user's gateway device, which prevents mutual access between users

ACL is configured on the AC, which prevents mutual access between users

The port isolation configured on the switch connected to the AP prevents mutual access between users

User isolation is configured on the wireless service-set, preventing mutual access between users

5. In the WLAN network environment, according to the classification of equipment security categories, which categories can it be divided into? (Multiple choice)

Legitimate Devices

Illegal devices

Testing equipment

Interfering devices

6. Which of the following ports can only belong to 1 VLAN?

access

hybrid

trunk

eth-trunk

7. In a dual-link backup network, what will the AP use to distinguish between the active AC and the standby AC? (Multiple choice)

Priority

The IP address of the AC

AC load condition

The time when the AC responds to the AP

8. What type of frame () does the ACK frame belong to in WLAN?

Management frame

Control frame

Data frame

Empty data frame

9. Capacity planning mainly starts from the aspects of equipment performance, number of users, bandwidth requirements and wireless environment, etc., and estimates the number of APs required to meet the business volume.

True

False

10. According to the network architecture between the AP and the AC, the networking methods can be divided into two-layer networking methods and three-layer networking methods.

True

False

Page 2 of 15

11. Among the following options, which factors will cause the user to find no wireless network signal? (Multiple choice)

The AP is configured with 5G priority, causing the 2.4G wireless client to find no signal

The user's wireless network card is not enabled or the hardware switch of the wireless network card is not turned on

The wireless controller is configured with the user isolation function

The driver of the user's wireless network card is abnormal

12. Which two of the following are PoE power supply standards? (Multiple choice)

IEEE 802.3ae

IEEE 802.3af

IEEE 802.3as

IEEE 802.3at

13. Which of the following does not belong to the message type used in the process of establishing Mesh neighbors? (Multiple choice)

Mesh Peering Open

Mesh Peering Confirm

Hello

Mesh Peering Close

14. Which of the following protocols support the 2.4GHz frequency band? (Multiple choice)

802.11a

802.11b

802.11g

802.11n

15. Which of the following servers is a directory server?

Radius server

AD server

DNS server

Portal server

16. What factors are related to the coverage of AP? (Multiple choice)

AP transmit power

Antenna Gain

AP volume size

Transmission loss

17. When the distance between the center frequencies of two channels is less than or equal to 25MHz, there will be overlapping areas between the channels, and there will be some interference. Therefore, in order to avoid adjacent frequency interference in channel planning in adjacent areas, the same channel is not allowed.

True

False

18. eSight network management is Huawei's dedicated network management platform, but it can only manage Huawei's own equipment.

True

False

19. If the terminal supports both 5GHz and 2.4GHz functions, the AP can configure and control such terminals to access 5GHz preferentially.

True

False

20. Regarding the triggering mechanism of 802.1x authentication, which of the following descriptions is correct? (Multiple choice)

The 802.1x authentication trigger can only be initiated by the client

802.1x authentication cannot be initiated by an authentication device (such as an 802.1x switch)

The 802.1x client can trigger authentication by multicast or broadcast

The authentication device can trigger authentication in multicast or unicast mode

Page 3 of 15

21. Which of the following are the relevant parameters of the Traffic template? (Multiple choice)

802.3 Priority Mapping Policy

CAC strategy

Tunnel Priority Mapping Policy

ACK strategy

22. A large enterprise deploys a WLAN network, and some of the SSIDs use the direct forwarding method. Which of the following descriptions about the characteristics of the direct forwarding method is correct? (Multiple choice)

Business data does not need to be migrated back to the AC, and there is no forwarding bottleneck

It is convenient for centralized policy control of wireless traffic, and has obvious advantages in user policy control, wireless roaming, etc.

Better security when data packets are forwarded

AC expansion is simple, just increase the number of independent ACs

23. What are the main contents of the CAPWAP protocol? (Multiple choice)

Automatic discovery of AC by AP and operation and maintenance of AP&AC state machine

AC manages APs and distributes service configurations

STA data is encapsulated in CAPWAP tunnel for forwarding

Defines the transmission rate of the Mac layer and the physical layer

24. In AP-based load balancing, which description is correct about the dynamic load balancing? (Multiple choice)

Dynamic load balancing solves the problem of limited number of members in static load balancing

Number of members for dynamic load balancing and members for static load balancing

Each member in the balancing group of dynamic load balancing is automatically configured or can be a different frequency band

Each member in the balancing group of dynamic load balancing can be automatically configured but must be in the same frequency band

25. Which of the following statements about star networking in Mesh networking is correct? (Multiple choice)

All connections need to forward data through the central gateway device

All connections do not need to pass through the central gateway device for data forwarding

All LAN data transmission must pass through MPP

All LAN data transmission does not need to pass through MPP

26. 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?

20 seconds

60 seconds

75 seconds

90 seconds

27. IEEE is the standards organization responsible for the use of radio frequencies in the United States.

True

False

28. The basic service set is the basic component of the 802.11 network, which is composed of a group of workstations communicating with each other.

True

False

29. Huawei wireless controller AC6605 supports user access security management through security templates, and supports four security policies: WEP, WPA/WPA2, and WAPI.

True

False

30. In the N+1 backup scenario, which of the following statements about the active/standby switchover function is correct? (Multiple choice)

By default, the global switchback function of the standby AC is enabled.

By default, the global switchback function of the standby AC is disabled

The N+1 backup scenario does not support the backup AC to turn off the active/standby switch.

In N+1 backup scenario, the backup AC is supported to turn off the active/standby switching function.

Page 4 of 15

31. The security strategy based on user authentication widely used in enterprise networks is (). (Multiple choice)

WPA1PSK+TKIP/CCMP

WPA1 802.1X+TKIP/CCMP

WPA2 PSK+TKIP/CCMP

WPA2 802.1X+TKIP/CCMP

32. Which of the following standards organizations implements WLAN technology interoperability for WLAN equipment certification?

WiFi Alliance

IEEE

IETF

FCC

33. Which of the following belongs to the role of Mesh network? (Multiple choice)

MPP

MAP

VAP

34. Which of the following description of PSK authentication is wrong?

PSK authentication needs to configure the same pre-shared key on the wireless client and device

Both WPA and WPA2 support PSK authentication

The PSK authentication process is similar to the shared key authentication process, so the security is the same

PSK authentication is to verify the legitimacy of the STA side Key through 4-way handshake Key negotiation

35. AAA is a management framework, which protocol is more commonly used to achieve?

RADIUS

CAPWAP

802.11a/b/g/n

802.1X

36. The lobe width is a very important parameter commonly used in directional antennas. It refers to the width of the angle formed by the radiation pattern of the antenna below the peak value () dB.

37. Which channels in the 802.11b protocol are non-overlapping? (Multiple choice)

38. As shown in the figure, regarding the N+1 backup network, which of the following descriptions is correct? (Multiple choice)

The standby AC3 must be in the same Layer 2 network as the active AC1 and active AC2

On the standby AC3, all APs under the active AC1 and active AC2 must be configured to ensure that the AP can obtain the correct configuration after AC switching

Configure the corresponding priority of the AP on each active and standby AC, and the AP can select the corresponding active AC according to the priority carried by the AC

You can configure the corresponding MAC whitelist on the main AC to ensure that the AP can go online on the corresponding AC, so as to assist the AP to choose the correct main AC

39. Regarding the Agile Controller access model, which of the following descriptions is correct? (Multiple choice)

In the access model, the core is authorization conditions and authorization results

Currently only 802.1x and Portal authentication can support all conditions in the access model

Authorization elements do not include IP address ranges

Authorization conditions include authorization elements

40. When a data frame is sent and confirmed, what is the time interval before the next data frame is sent?

SIFS

IFS

DIFS

PIFS

Page 5 of 15

41. If you want to create an open authentication security template, which of the following configuration is correct?

AC-WLAN-view] security-profile name security-1 id 1 [AC-WLAN-sec-prof-security-1] open authentication-method open-system [AC-WLAN-sec-prof-security-1] security-policy open [AC-WLAN-sec-prof-security-1] quit

AC-WLAN-view] security-profile name security-1 id 1 [AC-WLAN-sec-prof-security-1] wep authentication-method open-system [AC-WLAN-sec-prof-security-1] security-policy wep [AC-WLAN-sec-prof-security-1] quit

AC-WLAN-view] security-profile name security-1 id 1 [AC-WLAN-sec-prof-security-1] wpa authentication-method open-system [AC-WLAN-sec-prof-security-1] security-policy wpa [AC-WLAN-sec-prof-security-1] quit

AC-WLAN-view] security-profile name security-1 id 1 [AC-WLAN-sec-prof-security-1] wpa2 authentication-method open-system [AC-WLAN-sec-prof-security-1] security-policy wpa2 [AC-WLAN-sec-prof-security-1] quit

42. In order to obtain better coverage effect, how can the AP signal pass through the wall as much as possible?

vertical

Parallel

45°

60°

43. What is the distance between the center frequencies of each channel in the 2.4 GHz band?

20 MHz

22 MHz

5 MHz

10 MHz

44. 1. In the 802.11 frame, what type of frame does the STA 's association request and authentication request belong to?

Data frame

Control frame

Management frame

Data frames, control frames, and management frames all have this function

45. In the terminology of PoE, what does AP belong to?

PSE

PSU

46. A large enterprise deploys an L network, and part of the SS1D user data forwarding mode is configured with collision forwarding. In the following description of the collision forwarding method, which options are correct? (Multiple choice)

Business data forwarding basically does not consume WC performance, and it is more convenient to expand the number of P

The data message is encrypted when it is forwarded, so it is not easy to be stolen by the middleman

The service data is directly forwarded by the AP to the service gateway, and does not need to be migrated back to the WAC, and the forwarding efficiency is high

It is convenient for centralized policy control of wireless traffic, and has obvious advantages in user policy control and other aspects

YAC must communicate with the service VLAN layer 2

47. When a large enterprise deploys WLAN layer 3 networking, it is necessary to configure the Option 43 field on the Windows 2003 DHCP Server to notify the AP of the AC's IP address.

The IP address of the AC is 10.23.100.1. Which of the following should be configured in the Option 43 field on the JDHCP Server?

030831302E32332E3130302E31

040831302E32332E3130302E31

030B31302E32332E3130302E31

030B31302E32332E31302E3031

48. What parameters are used in 802.11 frames to reassemble frame segments?

Frame Control

Duration

Address bit

Fragment number

49. CCMP encryption is more secure than TKIP encryption because of which of the following?

A longer IV is used

Added a key distribution mechanism and no longer use a single key

A more complex encryption algorithm is used

Added message integrity check mechanism

50. After the wireless user connects to the wireless signal point, the IP address cannot be obtained. What are the possible reasons? (Multiple choice)

The VLAN where the user is located is not configured with a DHCP server

dhcp-enable is not configured on the wlan-ess virtual interface

The authentication password specified by the user is incorrect

The MAC address of the user equipment has been added to the blacklist

Page 6 of 15

51. What types of routing protocols does the HWMP protocol support? (Multiple choice)

pro-active

OSPF

on-demand

IGRP

52. Which of the following commands is to add GE 0/0/1 port of Huawei access switch to VLAN100?

interface GigabitEthernet 0/0/1 port link-type access Port default VLAN 100

interface GigabitEthernet 0/0/1 port link-type access Port allow-pass VLAN 100

interface GigabitEthernet 0/0/1 port link-type trunk Trunk allow-pass VLAN 100

interface GigabitEthernet 0/0/1 port link-type trunk VLAN 100

53. Which of the following is not the main purpose of roaming?

Avoid packet loss or even service interruption caused by long authentication time during roaming

Ensure that user authorization information remains unchanged

Ensure that the user's IP address remains unchanged

Ensure that the user's network speed remains unchanged

54. Which of the following statements is correct? (Multiple choice)

When the user performs web authentication, it is triggered by the user's http message before the IP address is obtained successfully; at this time, the user is forced to redirect to the portal server for the authentication process

When the user performs web authentication, it is triggered by the user's http message after successfully obtaining the IP address; at this time, the user is forced to redirect to the portal server for the authentication process

WPA2 uses 802.1X authentication

WPA only supports TKIP as an encryption technology

55. Compared with 802.1X authentication, what are the advantages of Porta1 authentication? (Multiple choice)

Portal can be used in dumb terminal access scenarios

Portal authentication is more suitable for temporary visitors to the network

Portal authentication does not require the installation of client software

Portal authentication is compatible with MAC bypass authentication

56. The AP periodically sends Discovery Request messages to check the status of the original primary link. When the link recovers, the AP detects that the priority level of the link is higher than that of the current primary link, and triggers a switchback. In order to avoid frequent switching caused by network vibration, after waiting for 6 echo cycles, the AC is notified to perform active/standby simultaneous switching, and at the same time, the AP sends the data services of the STAs to the newly upgraded AC.

True

False

57. How many management nodes does the eSight standard version support at most?

2000

5000

20000

58. For the lobe width, which of the following description is correct? (Multiple choice)

Within the range of the main lobe, the angle at which the power density drops by half (3dB) relative to the maximum radiation direction

The narrower the beam width, the better the directivity, the farther the radiation distance, and the stronger the anti-interference ability

Patterns usually have two or more lobes

The terminal can receive the signal only within the coverage of the half-power angle

59. According to the different signal parameters to be controlled, what kind of modulation methods can be divided into? (Multiple choice)

Phasing

Modulation

60. () command can be used to view the AP group or AP personality template information of the specified MESH template.

Page 7 of 15

61. Regarding AD server and LDAP server, which of the following descriptions is wrong?

AD is a dedicated directory server for Windows Server

LDAP can be installed on Windows Server

The directory service protocol used by the AD server is the AD protocol

The directory service protocol used by the AD server is the LDAP protocol

62. Each AC device needs to specify the source IP address of the AC in order to establish a CAPWAP tunnel with the AP. An AC can specify up to 2 WLAN source IP addresses.

True

False

63. What is the recommended AC-ID () for Huawei wireless controllers when configuring enterprise network WLAN services?

cmcc (China Mobile)

ctc (China Telecom)

cuc (China Unicom)

other (other)

64. In thin AP networking, which of the following authentication methods does not require AC participation in the authentication process?

Shared Key Authentication

802.1X authentication

PSK authentication

Portal authentication

65. Which of the following options is the maximum rate supported by the 802.11g protocol?

11Mbps

22Mbps

54Mbps

108Mbps

66. Which of the following belongs to the category of directional antennas? (Multiple choice)

Off-board cross-polarized antenna

Panel directional antenna

Panel Omnidirectional Antenna

Plate type cross-polarized antenna

67. When PPPoE authentication is used in WLAN, it has nothing to do with the authentication encryption adopted by WLAN itself.

True

False

68. The AC executes the load balancing process according to which of the following information?

The AP periodically sends information about its associated STAs to the AC

STA periodically reports the identity of the currently associated AP

The AC regularly queries the number of STAs associated with the AP

The STA periodically searches for surrounding AP information and reports the AP identity through the associated AP

69. What is a network composed of a wireless AP and associated wireless clients called?

IBSS

BSS

ESS

NSS

70. When an engineer uses Agile Controller to synchronize data, he finds that some user information cannot be synchronized. The user names that cannot be synchronized are as follows:Jack=boss, Mike=leader, Mary=manager, Ann=girlfriend.

The engineer found that these user names and the user groups or OUs they belonged to did not have the same name. What is the reason for the above problems?

The username is too long

Username too short

Illegal characters appear in the user name

The user name needs to be composed of numbers and English

Page 8 of 15

71. 802.11n MAC layer improvement technology includes which of the following? (Multiple choice)

Frame aggregation technology

MIMO technology

Block Confirmation Technology

Beamforming Technology

72. Which of the following description of WEP encryption is wrong?

WEP encryption uses a stream encryption algorithm

WEP encryption adds IV to break the regularity of the key

The length of IV in WEP encryption is 48bits

WEP encryption allows the device to store four keys at the same time

73. As shown in the figure, which of the following statements is correct about the dual-machine hot backup solution? (Multiple choice)

Figure a is the main and backup mode

Figure b is the main and backup mode

Figure a shows the load sharing method

The picture in b shows the load sharing method

74. Huawei AP6310AP is an outdoor AP that can support WDS function and realize point-to-multipoint wireless bridging function.

True

False

75. Please sort the establishment process of the Mesh connection.

76. Telnet is one of the ways to remotely manage APs. It can be configured to implement telnet authentication based on username and password.

True

False

77. Which of the following descriptions about business VAP is wrong? (Multiple choice)

Provide wireless terminal access function

Establish MESH connection

Each radio frequency can be configured with multiple, and the number is not limited

Each radio can be configured with only one

78. In the WDS point-to-point network, the backbone link between the Root AP and the Leaf AP is connected using the 5GHz frequency band. The frequency band used by the Root AP is 149, so which of the following frequency bands should the Leaf AP use?

149

153

157

All except 149

79. In mesh MESH networking, which of the following descriptions about MESH paths is correct? (Multiple choice)

There is only one MESH path

A wireless link formed by cascading a series of MESH connections between the source MP and the destination MP

There may be multiple MESH paths

In the MESH path, the source AP can be MP or MPP

80. What is the VLAN which used to establish a CAPWAP tunnel VLAN for AP and AC?

Management VLAN

Service VLAN

User VLAN

Authentication VLAN

Page 9 of 15

81. For WLAN networking diagram, which of the following description is wrong?

The picture shows side-mounted networking

The PVIDA of the management VLAN can be configured on the access switch.

You can use AC as a DHCP Server to assign IP addresses to APs

It is not possible to use the aggregation switch to assign IP addresses to STAs

82. For the polarization of electromagnetic waves, which of the following description is correct? (Multiple choice)

The antenna radiates electromagnetic waves to the surrounding space, and the direction of its electric field changes according to certain rules

The polarization of the antenna refers to the direction of the magnetic field strength formed when the antenna radiates

If the electric field direction of the electric wave is perpendicular to the ground, we call it a vertically polarized wave

If the transmitting antenna is circularly polarized, the receiving antenna must also be circularly polarized, and the polarization directions of the two must be the same

83. 802.11b supports () channels in the United States, of which () channels do not overlap.

14, 3

11, 3

11, 6

14, 6

84. When planning WLAN in a single area, the factors that affect the number of AP deployment are? (Multiple choice)

Number of people connected in the area

Size of the area

Field Strength and Bandwidth Requirements

Number of network ports

85. Regarding the establishment process of the standby CAPWAP link, which of the following statements is correct? (Multiple choice)

The AP and AC establish the primary tunnel and the backup tunnel at the same time and complete the configuration delivery

The AP sends a broadcast Discovery Request message to the standby AC

The Join Request sent by the AP will carry a custom message type, telling the standby AC that the configuration has been delivered and there is no need to send it again

When the AC receives the Join Request and obtains the custom message, it will skip the configuration delivery process during the configuration delivery phase to avoid repeatedly delivering configurations to the A

86. There are many video conferences in large companies, and QoS generally adopts which of the following service model?

Best Effort model

IntServ Model

FIFO model

DiffServ model

87. An infrastructure mode network consisting of multiple APs and the distributed systems connecting them, also known as which one?

Basic service set

Essential service area

Extended service set

Expanded service area

88. In WLAN bandwidth design, the average bandwidth of access users decreases linearly with the increase of users.

True

False

89. In the 802.11 frame, which message is used for the terminal to receive data packets in power saving mode?

RTS

CTS

ACK

PS-Poll

90. Which of the following wireless local area network standards can the transmission rate reach 54Mbps and above? (Multiple choice)

802.11a

802.11b

802.11g

802.11n

Page 10 of 15

91. WLAN AP can be powered by (). (Multiple choice)

POE switch

POE adapter

Independent power adapter

RF cable

92. How to set the conditions for switching triggers? (Multiple choice)

When the distance between the STA and the original AP reaches a certain distance, start the handover

Set the signal strength ratio between the current AP and the neighbor AP, and switch when the threshold is reached

Check the packet loss rate, and start switching when the packet loss rate reaches a certain value

Start switching when the network speed is very slow when associating with the original AP

93. In the 802.11 frame, what kind of control message should the terminal send to obtain access to the wireless medium?

RTS

CTS

ACK

PS-Poll

94. Radio frequency mainly adopts spread spectrum technology. Which of the following technologies belong to spread spectrum technology? (Multiple choice)

FHSS

DSSS

QPSK

OFDM

95. If the AP wants to obtain the IP address of the AC through the DNS server, it must first obtain its own IP address, DHCP Server and DNS IP addresses.

True

False

96. Part of the radio frequency tuning process, about the operation steps of radio frequency tuning

97. How many subcarriers can be used to transmit data in 802.11n 20M mode?

98. In order to solve the tunnel aggregation problem of WLAN roaming, which of the following statements is correct for the processing principles of downlink broadcast and multicast packets? (Multiple choice)

At the HAC, discard unknown unicast packets at the entrance of the roaming tunnel

At the HAC, discard the multicast or broadcast packets of ARP, ND, DHCP, and mDNS to avoid loops

The transparently transmitted broadcast/multicast packets reach the FAC, and the FAC converts them into unicast packets according to the source of the tunnel

FAP discards unknown unicast packets, and then forwards other packets to roaming STAs

99. Regarding the description of the characteristics of Huawei WLAN products, which of the following statement is correct?

Wireless controllers can be stacked for high availability

Huawei's AP radio frequency tuning function is divided into two types: global tuning and local tuning. The local tuning is done independently by the A

The switching threshold of WLAN load balancing can be configured in two ways: based on the number of users and based on the number of sessions

After dual-link backup is configured, if the user adopts the tunnel forwarding mode, the user's business will not be interrupted even if the active AC fails and restarts.

100. In a WLAN Layer 2 networking environment, which of the following methods can an AP use to discover an AC? (Multiple choice)

Multicast

Unicast

to broadcast

Anycast

Page 11 of 15

101. WDS technology improves the flexibility and convenience of the entire network structure, but it can only support the point-to-point working mode.

True

False

102. The power of AP installed indoors is generally () mw.

103. In the WLAN network, which of the following illegal attack detection needs the support of the dynamic blacklist function? (Multiple choice)

Flood attack detection

Spoof attack detection

Weak lV attack detection

Anti-brute force cracking

104. Regarding the description of fast roaming, which of the following statements is correct? (Multiple choice)

There is no re-authentication process after fast roaming, only need to complete the four-step key exchange

AP needs to support fast roaming to achieve fast roaming, and for terminals, any terminal is enough

There is no re-authentication process after fast roaming, and there is no need for four-step key key interaction

When the user uses a non-A2+dt1x encryption authentication method, the roaming status of the user is non-fast roaming

105. As shown in the figure, which is the correct label for the Fresnel area? (Multiple choice)

106. The 802.11 protocol that defines the quality of service in WLAN is?

802.11f

802.11i

802.11e

802.11n

107. Regarding the method of AP access control below, which of the following statement is incorrect? (Multiple choice)

By default, the control method for AP access to AC is non-authentication

By configuring the AP in an offline state, authentication is required before automatic access

Configuration whitelist can be authenticated based on MAC or SN

If MAC authentication is used for AP access control, APs outside the MAC authentication list can also be manually confirmed to allow them to go online

108. The point-to-point wireless bridge can be used to connect two networks located in different places. In the wireless backbone connection, Root AP and Leaf AP should be set to different channels.

True

False

109. In WDS deployment, which bridge networking modes include? (Multiple choice)

Peer-to-peer

Point-to-Multipoint

Relay bridge mode

Multipoint to multipoint mode

110. Which one does the roaming of terminals in different VLANs belong to?

Seamless AP roaming

Layer 2 Roaming

Layer 3 Roaming

Layer 4 Roaming

Page 12 of 15

111. Which of the following is an Agile Controller authorization element? (Multiple choice)

SSID

time

Device name

IP address

112. During the maintenance phase of the CAPWAP tunnel, the TAC and the AP exchange Echo messages (UDP port number is 5246) to detect the connection status of the control tunnel.

True

False

113. Which of the following modes does Huawei RF tuning support? (Multiple choice)

Automatic mode

Timing mode

Manual mode

Adaptive mode

114. Which of the following is not an AP binding template?

RF template

AP template

ESS template

Planning sheet template

115. Regarding the process of Mesh nodes going online on AC, which of the following descriptions is correct? (Multiple choice)

The AP establishes a Mesh air interface link with an online Mesh neighbor, performs key negotiation, establishes a Mesh route, obtains an IP address through the DHCP process, finds the AC, and performs the subsequent online process

The AP establishes a Mesh air interface link with an online Mesh neighbor, establishes a Mesh route, performs key negotiation, obtains an IP address through the DHCP process, finds an AC, and performs the subsequent online process

The AP establishes a Mesh air interface link with the online Mesh neighbor, performs key negotiation, obtains an IP address through the DHCP process, establishes a Mesh route, finds the AC, and performs the subsequent online process

After the AP is initially powered on, after the AC goes online to obtain the configuration, it will re-establish the link and key negotiation according to the new configuration.

116. Which of the following wireless frames are control frames? (Multiple choice)

Beacon

RTS CC TS

PS-Poll

117. MIMO (Multiple input and multiple output), that is, multiple input and multiple output, wireless access points and clients using 802.11n technology can use up to three spatial streams to transmit data at the same time, and the theoretical rate can reach up to 600Mbps.

True

False

118. The index used to describe the degree of concentration of the antenna on the transmission power is ().

Broadband

Power

Gain

Polarity

119. Which of the following materials does the WLAN signal have less penetration loss? (Multiple choice)

Gypsum board

Glass window (colorless)

Concrete walls

brick wall

120. Which of the following statement is correct? (Multiple choice)

WPA2 PSK authentication requires the user to enter the user name and password to connect

WPA2 uses 802.1X authentication

WAPI is China's wireless local area network national standard system

Page 13 of 15

121. During the roaming process, which packets may be improperly processed to cause tunnel aggregation problems? (Multiple choice)

Unknown unicast

broadcasting

Multicast

122. In order to detect malicious or unintentional attacks on the LAN network in time, the network administrator can choose to enable the corresponding attack detection function according to the actual situation to monitor and prevent attacks. By default, which of the following attack detection functions are turned off in the radio frequency view of the AP group? (Multiple choice)

Brute force key attack

Spoofing attack

Flood attack

Weak vector attack

123. As shown in the picture (just remember the answer) (Multiple choice)

20 degrees

30 degrees

40 degrees

60 degrees

124. Which of the following configurations about citing AP system templates and MESH templates is correct? (Multiple choice)

[AC-wlan-view] ap-group name mesh-mpp [AC-wlan-ap-group-mesh-mpp] wired-port-profile wired-port gigabitethernet 0

[AC-wlan-view] ap-group name mesh-mpp [AC-wlan-ap-group-mesh-mpp] regulatory-domain-profile domain 1

[AC-wlan-view] ap-group name mesh-mpp [AC-wlan-ap-group-mesh-mpp] mesh-profile mesh-net radio 1

[AC-wlan-view] ap-group name mesh-mpp [AC-wlan-ap-group-mesh-mpp] ap-system-profile mesh-sys

125. The antenna configuration of MIMO is usually expressed as "M*N", what M and N are represent? (Multiple choice)

M indicates the number of transmitting antennas

N represents the number of transmit antennas

N represents the number of receiving antennas

M indicates the number of receiving antennas

126. What is the 2.4 GHz band U.S. non-overlapping channel?

2, 7, 12

3, 8, 13

1, 6, 11

3, 7, 13

127. As shown in the figure, in the dual-link cold standby load sharing network, the configuration is as shown in the figure, AP1 has been online, and AC1 and AP1 have established a main line. When the link between AP1 and AC1 is disconnected, under normal circumstances, which of the following time points may the active/standby switchover occur? (Multiple choice)

120 seconds

130 seconds

145 seconds

155 seconds

128. In some special environments, it is necessary to use more APs. The channels cannot be completely separated. Therefore, it is possible to consider appropriately reducing the transmit power of APs to reduce the interference between signals.

True

False

129. Which of the following statements about antenna classification is correct? (Multiple choice)

Classified by directionality: omnidirectional antenna, directional antenna, etc.

Classified by shape: linear antenna, planar antenna, etc.

Classification by use: short wave antenna, ultrashort wave antenna, microwave antenna, etc.

Classified by working frequency band: communication antenna, TV antenna, radar antenna, etc.

130. According to the following configuration example, which of the following statement is correct?

[AC] dhcp enable

[AC] interface VLANif100

[AC-VLANif100] ip address 10.1.100.1 24

[AC-VLANif100] dhcp select interface

[AC-VLANif100] quit

The DHCP service is enabled by default in the global mode, so dhcp enable does not need to be configured again

The command dhcp select interface is to enable the DHCP client function on the VLAN 100 interface

If VLAN100 is a user VLAN, the gateway after the user receives the address is 10.1.100.1, and the mask is 255.255.255.0

If VLAN 100 is the management VLAN where the AP is located, the option 43 field in the DHCP message that the AP will receive should be 10.1.100.1

Page 14 of 15

131. What is the function of AC in a wireless network? (Multiple choice)

Centrally manage APs

Realize the roaming function

Send a beacon frame

Wireless Intrusion Detection

132. Which of the following methods are included in radio frequency tuning? (Multiple choice)

Global RF tuning

Interface RF tuning

Local RF tuning

Process RF tuning

133. Which one is wrong about the WLAN Layer 2 and Layer 3 networking methods? (Multiple choice)

The Layer 2 networking method is simple in networking and management, and is suitable for small-scale networking, such as the Layer 2 of a small enterprise network.

In the networking mode, the AP needs to discover the AC through unicast

The three-layer network is flexible and easy to expand, and it is compatible with the complex and refined WLAN network of large enterprises

In the three-layer networking mode, the AP can discover the AC through broadcasting

134. In the WLAN network with the WIDS function enabled, regarding the judgment of illegal devices, which of the following statements is correct? (Multiple choice)

So Ad-hoc devices will be directly judged as illegal devices

Access to APs other than this AC is an illegal AP

The STA that is not connected to this AC is an illegal STA

If the AC is not connected to the STA, it is also necessary to check whether the access to the AP is legal.

135. Which of the following technologies belongs to wireless metropolitan area network?

2G/3G

WLAN

Bluetooth

WiMAX

136. Various pipes, metal keels and aluminum alloy gussets in the ceiling will have a great impact on the actual signal coverage effect.

True

False

137. Regarding the role of each role in the Portal authentication architecture, which of the following descriptions is correct? (Multiple choice)

The RADIUS server saves information such as user name and password for authentication of access users

The Portal server saves information such as user name and password for authentication of access users

The RADIUS server is used to push the Portal authentication page to the user

The Portal server is used to push the Portal authentication page to the user

138. What is the systematic process of AP radio resource management?

Acquisition->Decision->Analysis->Execution

Analysis->Acquisition->Decision->Execution

Acquisition -> Analysis -> Execution -> Decision

Acquisition -> Analysis -> Decision -> Execution

139. If there is a high demand for WLAN capacity in a certain coverage area, which of the following should be considered by the construction method?

Indoor distribution system combination

Combined circuit of outdoor distribution system

Indoor installation

Outdoor AP+directional antenna

140. Which of the following statements about WLAN indoor channel planning is wrong?

It is necessary to confirm the local available channels with the customer before planning

Same as the channel of the signal sent by the antenna connected to the indoor AP

Huawei's indoor distribution AP6310 supports channel planning for both 2.4G and 5G frequency bands

Adjacent edge antennas do not use the same channel

Page 15 of 15

141. When wireless network engineers plan WLAN networks, the purpose of using RF simulation is? (Multiple choice)

Simulate the signal coverage effect and find out the blind spots

Obtaining the distribution of field strength at different locations

Obtain the current signal-to-noise ratio of different locations

Obtain available bandwidth at different locations

142. TKIP encryption is more secure than WEP encryption because of which of the following? (Multiple choice)

A longer IV is used

Added a key distribution mechanism and no longer use a single key

A more complex encryption algorithm is used

A stronger data verification algorithm is adopted

143. Which of the following technologies is a method to realize STA fast roaming? (Multiple choice)

PMK caching

Key agreement moved down

Improve the initiative of terminal roaming

Home Agency Department on AC

144. A 10-story building needs to cover WLAN signals, because considering the floor blocking, the signal frequency of WLAN on the 5th and 6th floors can be set to 6 channels at the same time.

True

False

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