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Huawei H12-311_V3.0 HCIA-WLAN V3.0 Exam Practice Test

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Total 338 questions

HCIA-WLAN V3.0 Questions and Answers

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Question 1

exist 802.1X In the agreement, you must have () to be able to complete the authentication and authorization of the user. (Select 3 Answers)

Options:

A.

eSight server

B.

Client

C.

Authenticator

D.

Authentication server

Question 2

Terminal is different VLAN The roaming within belongs to ().

Options:

A.

Seamless AP roaming

B.

Two-tier roaming

C.

Three-tier roaming

D.

Four-tier roaming

Question 3

802.11n Standard uses dual band (2.4GHz and 5GHz ), the theoretical transmission rate can reach up to 300Mbps, The actual test rate can reach arrive 100Mbps above.

Options:

A.

True

B.

False

Question 4

Which of the following 2.4GHz The frequency bands are non-overlapping

channels (). (Select 3 Answers)

Options:

A.

6 and 11

B.

3 and 8

C.

4 and 8

D.

4 and 10

Question 5

AP Domain AP The deployment type does not include ().

Options:

A.

Ordinary deployment

B.

Orderly deployment

C.

Discrete deployment

D.

Densely deployed

Question 6

802.11 Frame, when the network uses WDS When the model is signaled, To DS and From DS What are the values of ()?

Options:

A.

0,0

B.

0,1

C.

1,0

D.

1,1

Question 7

Which configuration methods does the wireless controller support ()?

(Select 3 Answers)

Options:

A.

telnet Configuration

B.

console Port configuration

C.

pass through eSight Configuration

D.

LLDP Configuration

Question 8

WLAN security policies are configured in security profiles. As such, WPA/WPA2 PPSK must be configured in the security profiles.

Options:

A.

True

B.

False

Question 9

802.11b Which channels in the protocol do not overlap each other()? (Select 3 Answers)

Options:

A.

1

B.

3

C.

6

D.

11

Question 10

TKIP Encryption ratio WEP Encryption security is high because of (). (Select 3 Answers)

Options:

A.

Used longer IV

B.

Added a key distribution mechanism, no longer using a single key

C.

A more complex encryption algorithm is used

D.

Adopt a stronger data verification algorithm

Question 11

Which of the following types of frames does a STA receive to obtain surrounding wireless network information during passive scanning?

Options:

A.

Authentication frame

B.

Association Request frame

C.

Beacon frame

D.

Probe Request frame

Question 12

Which of the following is a restart AC6605 The command()?

Options:

A.

reload

B.

reboot

C.

[Quidway]reload

D.

[Quidway] reboot

Question 13

Which of the following statements is true about the coverage distance design principles of a single AP (20 dBm)?

Options:

A.

It is recommended that a 5.8 GHz AP be deployed for through-wall signal coverage.

B.

In the same scenario, the coverage distance of a 2.4 GHz AP is smaller than that of a 5.8 GHz AP.

C.

Inter-floor coverage is supported.

D.

In an open area, the coverage distance is designed based on the AP's coverage capability.

Question 14

Among the following options, which factors will cause users to be unable to search for wireless network signals ()? (Select 2 Answers)

Options:

A.

AP Configured 5G Priority, leading to 2.4G Wireless client cannot find the signal

B.

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

C.

The wireless controller is equipped with user isolation function

D.

The user's wireless network card driver is abnormal

Question 15

for AC+ thin AP The network architecture, the following description is wrong ().

Options:

A.

AP Can't work alone, need to be AC Centralized agent maintenance management

B.

able to pass AC Enhance business QoS, Security and other functions

C.

AP Zero configuration itself, suitable for large-scale networking

D.

Must be achieved through the network management system AP And user management

Question 16

Among the following options, () is the reason for using 5G priority access.

Options:

A.

It is easier to make network planning in the 5G frequency band

B.

5G frequency band can provide better access capability and capacity

C.

The connection speed between users and APs in the 5G frequency band is very fast

D.

The transmission rate of the 5G frequency band is higher than that of the 2.4G frequency band

Question 17

Which of the following statements is true about shared key authentication?

Options:

A.

Shared key authentication requires that a STA and an AP have the same key preconfigured.

B.

The shared key enables easy scalability and provides high security.

C.

For a Fit AP, the shared key is preconfigured on an AC.

D.

WEP encryption is not mandatory when shared key authentication is used.

Question 18

2.4 GHz What is the distance between the center frequencies of the channels in the frequency band ()?

Options:

A.

20 MHz

B.

22 MHz

C.

5 MHz

D.

10 MHz

Question 19

AP There are several types of domain deployment (). (Select 3 Answers)

Options:

A.

Independent deployment

B.

Discrete deployment

C.

Ordinary deployment

D.

Densely deployed

Question 20

original 802.11 What is the maximum rate supported by the protocol Mbps ()?

Options:

A.

1

B.

2

C.

5.5

D.

11

Question 21

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

Options:

A.

cmcc (China Mobile)

B.

ctc (China Telecom)

C.

cuc (China Unicom)

D.

other (other)

Question 22

Which of the following statements about WLAN roaming are false?

Options:

A.

APs with which a STA is associated before and after roaming can work on different channels.

B.

During roaming, the STA sends an Association Request frame containing home AP information to the foreign AP.

C.

APs with which a STA is associated before and after roaming must work on the same channel.

D.

During roaming, the STA sends a Reassociation Request frame containing home AP information to the foreign AP.

Question 23

exist PoE Of terms, AP What does it belong to ()?

Options:

A.

PSE

B.

PD

C.

PI

D.

PSU

Question 24

The electrical performance indicators of the antenna include ().

(Select 3 Answers)

Options:

A.

Gain

B.

Lobe width

C.

Power size

D.

Polarization mode

Question 25

Which of the following statements are true about a typical AP group?

Options:

A.

To optimize roaming, an AP can be added to two AP groups at the same time.

B.

With factory defaults, all APs belong to the AP group named default.

C.

APs in the same AP group can be uniformly scheduled using the same security policy.

D.

SSIDs can be configured for APs in the same AP group in a unified manner.

Question 26

The following about SSID The statement is wrong ().

Options:

A.

One AP Can release multiple different SSID

B.

Multiple AP Can release the same one on SSID

C.

One AP Configurable SSID There is no limit to the number

D.

One AP Can release the same SSID Signal

Question 27

Which of the following statements about Huawei's agile distributed Wi-Fi solution is false?

Options:

A.

If an AC has a license that supports management of 100 APs, the AC can manage a maximum of 100 RUs.

B.

The agile distributed architecture of the solution divides a traditional AP into two independent devices: a central AP and remote unit (RU).

C.

The central AP connects to RUs in rooms through network cables without wall penetration loss or feeder loss, providing high-quality signal coverage.

D.

This solution applies to sites with densely distributed rooms, such as dormitories, hotels, and wards.

Question 28

After deploying a WLAN, an engineer finds that the corresponding SSIDs cannot be discovered and suspects that some APs failed to go online. To query the APs that have gone online on the AC, the engineer can run the ___ command.

Options:

Question 29

When collecting fault information, you need to collect device logs, including ___ logs and ___ logs.

Options:

Question 30

AP able to pass POE The switch performs power supply and data transmission.

Options:

A.

True

B.

False

Question 31

Large companies have more video conferences, and QoS generally adopts the () service model.

Options:

A.

Best Effort model

B.

IntServ model

C.

FIFO model

D.

DiffServ model

Question 32

Which of the following protocols support 2.4GHz Frequency band()? (Select 3 Answers)

Options:

A.

802.11a

B.

802.11b

C.

802.11g

D.

802.11n

Question 33

WEP The encrypted data algorithm uses () algorithm.

Options:

A.

RC4

B.

AES

C.

CCMP

D.

Asymmetric encryption

Question 34

WIDS Attack detection contains ().

(Select 3 Answers)

Options:

A.

Flood Attack detection

B.

Weak IV Attack detection

C.

Spoof Attack detection

D.

Microwave interference detection

Question 35

There are four wireless STA, According to the following backoff time parameters, which workstation has the priority to occupy the channel?

Options:

A.

5

B.

7

C.

4

D.

6

Question 36

According to the following configuration example, 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

Options:

A.

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

B.

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

C.

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

D.

If VLAN100 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

Question 37

Which of the following options is 802.11g The maximum rate supported by the protocol ()?

Options:

A.

11Mbps

B.

22Mbps

C.

54Mbps

D.

108Mbps

Question 38

AP The systematic process of radio frequency resource management is ().

Options:

A.

Acquisition -> Decision -> Analysis -> Execution

B.

Analysis -> Acquisition -> Decision -> Execution

C.

Acquisition -> Analysis -> Execution -> Decision

D.

Acquisition -> Analysis -> Decision -> Execution

Question 39

MIMO(Multiple input and multiple output) The client can use at most 3 Two spatial streams transmit data at the same time, and the maximum theoretical rate can reach , That is, multiple input and multiple output, using 600Mbps . 802.11n Technology wireless access point and guest

Options:

A.

True

B.

False

Question 40

Which of the following commands is not necessarily run in the WLAN view?

Options:

A.

ssid-profile name xxx

B.

capwap source interface vlanif 100

C.

ap auth-mode mac-auth

D.

ap-group name xxx

Question 41

CAPWAP The port number of the control message of the tunnel protocol is ().

Options:

A.

1645

B.

1646

C.

5246

D.

5247

Question 42

Below does not belong AP The binding template is ().

Options:

A.

RF template

B.

AP template

C.

ESS template

D.

Planning table template

Question 43

The following statement about the AP access control method is incorrect ().

(Select 2 Answers)

Options:

A.

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

B.

By configuring the AP in an offline state, authentication is required to automatically access

C.

The configuration whitelist can be authenticated based on MAC or SN

D.

If MAC authentication is used for AP access control, APs outside of the MAC authentication list can also go online after manual confirmation

Question 44

Compared with 802.11a/b/g, the technical advantages of 802.11n include which of the following aspects ()?

Options:

A.

The maximum theoretical transmission rate is increased to 600Mbps

B.

Backward compatible with 802.11a/b/g protocol

C.

Support MIMO technology

D.

The other three items are correct

Question 45

If there is a high demand for WLAN capacity in a coverage area, the construction method of () should be considered.

Options:

A.

Combination of indoor distribution system

B.

Combination of outdoor distribution system

C.

Indoor installation

D.

Outdoor AP+ directional antenna

Question 46

802.11g What is the bandwidth of each channel of the frequency band ()?

Options:

A.

25 MHz

B.

20 MHz

C.

50 MHz

D.

22 MHz

Question 47

What are the general methods to solve co-channel interference (). (Select 3 Answers)

Options:

A.

adjust AP Transmit power, adjust antenna feeder

B.

Reasonable frequency reuse to ensure that the same channel does not appear in the same or adjacent coverage areas

C.

Use omnidirectional antennas for coverage

D.

Use obstacles for natural isolation

Question 48

WLAN The commonly used radio frequency cables in the system are (). (Select 3 Answers)

Options:

A.

RG-8 Jumper

B.

1/2 ”(Inch) Super flexible feeder

C.

1/2 "(Inch) feeder

D.

13/8 "(Inch) feeder

Question 49

What are China's mandatory standards for wireless LAN security ()?

Options:

A.

WiFi

B.

WAPI

C.

WLAN

D.

WiMAX

Question 50

In a large wireless network deployment scenario, AC When configured to "Layer 3 networking + bypass mode + direct forwarding", the gateway of the wireless user should. Where is it located ()?

Options:

A.

Convergence layer three switches

B.

One-arm router

C.

AC superior

D.

AP superior

Question 51

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

Options:

A.

3

B.

4

C.

5

D.

6

Question 52

Point-to-point wireless bridges can be used to connect two networks located at different locations. In the wireless backbone connection, they are set to different channels. Root AP and Leaf AP Should be set

Options:

A.

True

B.

False

Question 53

about 5G The working principle of priority, the following statement is correct ().

Options:

A.

5G Priority characteristics refer to 5G Client sends data first

B.

5G After the priority is turned on, only support 2.4G The network transmission speed of the client will be slower

C.

5G Priority request AP Is dual frequency AP Can work normally

D.

5G Priority requires all clients to support at the same time

Question 54

exist WDS In the deployment, what kinds of bridge networking modes are included ()? (Select 3 Answers)

Options:

A.

Point-to-point method

B.

Point-to-multipoint

C.

Relay bridging method

D.

Multipoint to multipoint

Question 55

According to the 802.11 random backoff mechanism, the backoff time must be an integer that is a multiple of the timeslot time.

Options:

A.

True

B.

False

Question 56

For Huawei AC To create a user, first use aaa Command to enter the view.

Options:

A.

True

B.

False

Question 57

How to set the condition of switching trigger (). (Select 2 Answers)

Options:

A.

when STA Yohara AP Start switching after reaching a certain distance

B.

Set current AP With neighbors AP Signal strength ratio, switch when reaching the threshold

C.

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

D.

Yohara AP Start the switch when the network speed is very slow during association

Question 58

What is the initialization state of an AP before the AP establishes a link with an AC for the first time?

Options:

A.

normal

B.

initial

C.

connecting

D.

idle

Question 59

For outdoor long-distance point-to-point backhaul, the antenna of () should be selected.

Options:

A.

High gain, small lobe width

B.

High gain, large lobe width

C.

Omnidirectional

D.

Low gain, large lobe width

Question 60

Which of the following standards organizations implements WLAN technical interoperability for WLAN equipment certification ()?

Options:

A.

WiFi

B.

IEEE

C.

IETF

D.

FCC

Question 61

Huawei AP6310AP Outdoor type AP,can support WDS Function to realize the point-to-multipoint wireless bridging function.

Options:

A.

True

B.

False

Question 62

What series of Huawei switches () is the Huawei plug-in controller ACU board suitable for?

(Select 3 Answers)

Options:

A.

S9300 series switches

B.

S9700 series switches

C.

S7700 series switches

D.

S5700 series switches

Question 63

The following Huawei AP Which AP support SFP Fiber interface()?

Options:

A.

AP6010DN

B.

AP6310SN

C.

AP6510DN

D.

AP6610DN

Question 64

Which of the following authentication modes belong to link authentication?

Options:

A.

PSK authentication

B.

PPSK authentication

C.

Shared key authentication

D.

Open system authentication

Question 65

Basic service sets (BSSs) are basic WLAN units.

Options:

A.

True

B.

False

Question 66

BSSID Is actually AP of MAC Address, used to identify AP Managed BSS .

Options:

A.

True

B.

False

Question 67

original 802.11 What is the working frequency band used by the agreement ()?

Options:

A.

2.4 GHz

B.

900 MHz

C.

2.0 GHz

D.

5 GHz

Question 68

If a STA is associated with an SSID that is the same on two APs, which of the following is used to identify the AP to which a STA is connected?

Options:

A.

BSSID

B.

ESSID

C.

BSA

D.

BSS

Question 69

WLAN When configuring the network, WMM Which of the following templates should the template be bound to ()?

Options:

A.

radio-profile

B.

traffic-profile

C.

security-profile

D.

service-set

Question 70

In the following description of WEP encryption, the error is ().

Options:

A.

WEP encryption uses a stream encryption algorithm

B.

WEP encryption adds IV to destroy the regularity of the key

C.

The length of IV in WEP encryption is 48 bits

D.

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

Question 71

Defined WLAN Medium service quality 802.11 The agreement is ().

Options:

A.

802.11f

B.

802.11i

C.

802.11e

D.

802.11n

Question 72

Configure the security policy of the wireless network as WEP , You need to AC6605 The security template is configured as follows ().

Options:

A.

security-policy wep

wep authentication-method open

wep key wep-40 hex 0 1234567890

wep default-key 0

B.

security-policy wep

policy wep share-key

wep key wep-40 hex 0 1234567890

wep default-key 0

C.

authentication policy wpa

wpa authentication-method share-key

wpa key wpa-40 hex 0 1234567890 wpa

default-key 0

D.

authentication policy wpa2

wpa2 authentication-method share-key

wpa2 key wpa2-40 hex 0 1234567890

wpa2 default-key 0

Question 73

In order to facilitate management and maintenance, AP The power supply mode is generally preferred to select () for power supply.

Options:

A.

Independent power adapter

B.

POE switch

C.

POE adapter

D.

AC power supply

Question 74

Huawei APs support SSIDs containing Chinese characters.

Options:

A.

True

B.

False

Question 75

After one data frame is sent and confirmed, what is the time interval to wait before sending the next data frame ()?

Options:

A.

SIFS

B.

IFS

C.

DIFS

D.

PIFS

Question 76

The antenna gains gain through ().

Options:

A.

Use power amplifiers in antenna systems

B.

Make the antenna radiation more concentrated

C.

Use high-efficiency antenna feeder

D.

Use equipment with low standing wave ratio

Question 77

Mesh Networking is defined in which of the following protocols ()?

Options:

A.

802.11a

B.

802.11g

C.

802.11e

D.

802.11s

Question 78

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

Options:

A.

True

B.

False

Question 79

In China, legally supported WLAN The frequency band has ().

(Select 2 Answers)

Options:

A.

2.4-2.4835GHz

B.

5.15-5.25GHz

C.

5.25-5.35GHz

D.

5.725-5.850GHz

Question 80

The following () service model can provide end-to-end QoS services, but the scalability is not good.

Options:

A.

Best Effort model

B.

IntServ model

C.

FIFO model

D.

DiffServ model

Question 81

an examination AC What is the command for online users ()?

Options:

A.

display users all

B.

display user-interface console 0

C.

display local-user

D.

display access-user

Question 82

Drag WLAN concepts on the left to their corresponding descriptions on the right.

Options:

Question 83

Which of the following AP Mode does not belong to WDS The internet()?

Options:

A.

Root AP

B.

Middle AP

C.

Bridge AP

D.

Leaf AP

Question 84

Regarding the two major PoE standards, the following statement is incorrect ().

(Select 2 Answers)

Options:

A.

The A.802.af standard was formulated in 2009, and the maximum output power is 30W

B.

802.at supports four power levels and only supports Category 5 lines

C.

802.af, also known as PoE+, can be compatible with 802.a devices

D.

802.at, also known as PoE+, can be compatible with 802.a devices

Question 85

To the following WLAN In the description of the network diagram, the error is ().

Options:

A.

The picture shows the bypass networking

B.

Can be configured and managed on the access switch VLAN of PVIDA.

C.

can use AC As DHCP Server ,give AP distribute IP address

D.

You cannot use the aggregation switch to STA distribute IP address

Question 86

The following command can configure the port of the Huawei switch as hybrid model()?

Options:

A.

swichport hybrid

B.

hybrid enable

C.

port link-type hybrid

D.

port mode hybrid

Question 87

about" AP6010DN

Options:

A.

AP6010DN

B.

AP6010DN

"The following statement is incorrect for the naming ()

middle" AP"Enterprise network AP In the specific prefix " 601"

On behalf of the standard indoor installation type

.

1 generation

C.

AP6010DN middle"D"represent AP Is dual frequency AP, While supporting 2.4GHz ,5GHz Frequency band

D.

AP6010DN middle"N"represent AP Yes 802.11n of AP

Question 88

The following transmission rate can reach 54Mbps What are the wireless LAN standards and above ()? (Select 3 Answers)

Options:

A.

802.11a

B.

802.11b

C.

802.11g

D.

802.11n

Question 89

according to AP and AC The inter-network architecture can divide the networking mode into two-tier networking and three-tier networking.

Options:

A.

True

B.

False

Question 90

The MEth0/0/1 interface of AC6605 is used for in-band network management. The default address is: 192.168.1.1/24, and it cannot be modified.

Options:

A.

True

B.

False

Question 91

Huawei plug-in controller ACU Board manageable AP What is the maximum number of ()?

Options:

A.

1024

B.

256

C.

512

D.

128

Question 92

antenna A The gain is 11dBi ,antenna B The gain is 8dBi , You can say the antenna A Than antenna B The gain is large ().

Options:

A.

3 dB

B.

3 dBi

C.

3 dBd

D.

uncertain

Question 93

Which of the following types of frames is the 802.11 ACK frame?

Options:

A.

Control frame

B.

Null data frame

C.

Data frame

D.

Management frame

Question 94

1024-QAM technology allows each subcarrier to carry __ bits.

Options:

A.

8

B.

10

C.

12

D.

14

Question 95

Barker Code is a 11 Bit sequence (e.g. 10110111000 ), there are advantages in wireless transmission, which can effectively reduce interference, but it reduces efficiency.

Options:

A.

True

B.

False

Question 96

802.11 In the frame, STA Which type of frame () does the association request and authentication request belong to?

Options:

A.

Data Frame

B.

Control frame

C.

Management frame

D.

Data frame, control frame, management frame have this function

Question 97

Which of the following standards are WiFi Developed by the alliance ()? (Select 2 Answers)

Options:

A.

802.11a/b/g/n

B.

WPA

C.

WPA2

D.

802.11i

Question 98

The following is for thin AP Is the description correct ()?

Options:

A.

thin AP Also known as wireless router

B.

thin AP Because of lack of function, is gradually getting fat AP replace

C.

thin AP Cannot be configured separately, must be used in conjunction with the wireless controller

D.

thin AP can be realised 802.1X Authentication, encryption and other functions, others such as QoS, Roaming functions are implemented on the wireless controller

Question 99

Telnet is one of the ways to manage AP remotely. Telnet authentication based on username and password can be realized through configuration.

Options:

A.

True

B.

False

Question 100

802.11 Wireless LAN CSMA/CA Which of the following are included in the mechanism ()? (Select 3 Answers)

Options:

A.

Carrier sense

B.

Multiple access

C.

Conflict detection

D.

Conflict avoidance

Question 101

The gain of the antenna can be explained ().

Options:

A.

Antenna's ability to amplify high-frequency electrical signals

B.

The antenna's ability to collect or emit electromagnetic waves in a certain direction is strong or weak

C.

Ability to amplify electromagnetic waves

D.

The antenna's ability to collect or emit electromagnetic waves in all directions is strong or weak

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Total 338 questions