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

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Total 297 questions

HCIA-WLAN V3.0 Questions and Answers

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Question 1

Among the following priority queues, the () queue has the highest default priority.

Options:

A.

AC-BE

B.

AC-VI

C.

AC-VO

D.

AC-BK

Question 2

thin AP Find AC In the process, the first step is AP Check if there is pre-configured static AC of IP List.

Options:

A.

True

B.

False

Question 3

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 4

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

Options:

A.

True

B.

False

Question 5

By multiple AP And the infrastructure mode network composed of distributed systems connecting them, also called what ()?

Options:

A.

Basic service set

B.

Basic service area

C.

Extended service set

D.

Extended service area

Question 6

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 7

Among the following options, () is a prerequisite for enabling Huawei's load balancing function.

Options:

A.

AP Belong to the same type

B.

AP In the same AC Under management, and AP Signal overlap

C.

STA Can scan to each other for load balancing AP

D.

AP The output power settings are the same

Question 8

802.11 In the frame, Frame Control In position Type What is the correct correspondence with the frame format ()?

Options:

A.

Type for 01 Time represents data frame

B.

Type for 10 Time represents control frame

C.

Type for 00 Indicates reserved use

D.

Type for 00 Time represents management

Question 9

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 10

The electrical performance indicators of the antenna include ().

(Select 3 Answers)

Options:

A.

Gain

B.

Lobe width

C.

Power size

D.

Polarization mode

Question 11

Regarding the functional characteristics of AP6010SN, which of the following statements is correct is ().

(Select 2 Answers)

Options:

A.

AP6010SN is an indoor distributed AP, which only supports working in the 2.4GHz frequency band

B.

AP6010SN has an Ethernet interface and supports 802.3af PoE power supply standard

C.

AP6010SN supports WDS function, which can realize point-to-point and point-to-multipoint wireless bridging

D.

AP6010SN not only has a built-in antenna, but also an external antenna, which is very convenient

Question 12

AP If you want to pass DNS Server fetch AC of IP Address, first get your own IP address,DHCP Server and DNS of IP address.

Options:

A.

True

B.

False

Question 13

There are three ways to judge Huawei's load balancing: traffic mode, session mode, and virtual switching mode.

Options:

A.

True

B.

False

Question 14

Among the following options, the common WLAN The source of interference is ().

(Select 3 Answers)

Options:

A.

Micro-wave oven

B.

remote control

C.

cordless phone

D.

Bluetooth transmission equipment

Question 15

WLAN The signal passes through which of the following materials with less penetration loss (). (Select 2 Answers)

Options:

A.

Gypsum board

B.

Glass window (colorless)

C.

Concrete wall

D.

Brick wall

Question 16

create radio-profile Must be bound wmm-profile Only possible, otherwise there will be configuration errors.

Options:

A.

True

B.

False

Question 17

20dBm Equivalent to () mW .

Options:

A.

100

B.

200

C.

500

D.

1000

Question 18

Which of the following commands can be viewed AC Current configuration()?

Options:

A.

display interface

B.

display current-configuration

C.

display ap all

D.

display version

Question 19

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

Question 20

1999 Year, IEEE 802.11a The standard formulation is completed. The standard stipulates that the working frequency band of wireless local area network can reach the transmission rate 11Mbps .

5.15 ~5.825GHz , Data transmission

Options:

A.

True

B.

False

Question 21

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 22

Configuration AP Authentication mode, AP What are the supported authentication methods

()? (Select 3 Answers)

Options:

A.

mac-auth

B.

sn-auth

C.

no-auth

D.

mac-sn-auth

Question 23

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

Options:

A.

1

B.

2

C.

5.5

D.

11

Question 24

BSS Full name Basic Service Set ,BSS It can be divided Independent BSS and Infrastructure BSS Two kinds.

Options:

A.

True

B.

False

Question 25

What frame does the wireless client actively scan to obtain the surrounding wireless network information ()?

Options:

A.

Beacon frame

B.

Probe Request frame

C.

Authentication Request frame

D.

Association Request frame

Question 26

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 27

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

Options:

A.

802.11a

B.

802.11g

C.

802.11e

D.

802.11s

Question 28

Int-Serv The model provides users with end-to-end absolute

Options:

A.

Limited bandwidth reservation

B.

Low forwarding efficiency

C.

Scalability is not good

D.

Not conducive to traffic monitoring

Question 29

because 802.11a The maximum rate supported is the same as 802.11g. The maximum rate supported is the same, so 802.11a Protocol is backward compatible 802.11g Agreement.

Options:

A.

True

B.

False

Question 30

IEEE 802.11 The standard used to define roaming is ().

Options:

A.

IEEE 802.11c

B.

IEEE 802.11h

C.

IEEE 802.11j

D.

IEEE 802.11r

Question 31

In the direct-connected networking solution, AP and AC Establish CAPWAP Tunnel, the management flow must be encapsulated in CAPWAP In the tunnel, data service

The stream can be optionally encapsulated in CAPWAP In the tunnel.

Options:

A.

True

B.

False

Question 32

For shared key authentication, the error described below is ().

Options:

A.

After adopting shared key authentication, you must use WEP Encryption

B.

The shared secret requires users and AP Use the same shared secret

C.

For skinny AP, The shared key is preset in AC middle

D.

The disadvantages of shared keys are poor scalability and not very secure

Question 33

Among the following obstacles, () has the largest loss of wireless signals.

Options:

A.

Plaster ceiling

B.

Glass

C.

120mm brick wall

D.

200mm concrete wall

Question 34

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 35

exist WLAN In the networking configuration, finally AC6605 What command must be executed to send the configuration to AP1 middle()?

Options:

A.

save ap id 1

B.

commit ap 1

C.

save ap 1 config

D.

save config ap 1

Question 36

It can be connected with the antenna via ().

Options:

A.

Network cable

B.

CATV coaxial cable

C.

Power cord

D.

50 ohm RF coaxial cable

Coaxial cable

Question 37

single AP What is the area covered ()?

Options:

A.

BSA

B.

ESA

C.

SSA

D.

TSA

Question 38

According to the following output, the following statement is correct ().

display device

AC6605-26-PWR's Device status:

Slot Sub Type Online Power Register Status Role

-----------------------------------

0-AC6605-26 Present PowerOn Registered Normal Master

POWER Present PowerOn Registered Normal NA

(Select 2 Answers)

Options:

A.

The user is currently operating on the wired side of the AC

B.

The user is currently operating on the wireless side of the AC

C.

According to the output, it can be concluded that the AC6605 uses a POE power supply module

D.

To implement the related configuration of WLAN, the user must first switch to the wireless side by CTRL+Ypass

Question 39

AP What are the reasons for being unable to go online ()?

(Select 3 Answers)

Options:

A.

DHCP Incorrect address pool configuration AP Unable to get address

B.

AP Use static discovery, but AC of IP Configuration error

C.

AP Version with AC Inconsistent versions

D.

The controller uses no-auth Authentication mode

Question 40

2.4 GHz What is the range of operating frequency specified by China ()?

Options:

A.

2.4 GHz-2.4835 GHz

B.

2.471 GHz-2.497 GHz

C.

2.4465 GHz-2.4835 GHz

D.

2.445 GHz-2.475 GHz

Question 41

By a wireless AP And what is the network of associated wireless clients called ()?

Options:

A.

IBSS

B.

BSS

C.

ESS

D.

NSS

Question 42

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 43

In an 802.11 frame, what kind of control message () should be sent by the terminal to obtain access to the wireless medium?

Options:

A.

RTS

B.

CTS

C.

ACK

D.

PS-Poll

Question 44

802.11a exist 20M How many sub-carriers can be used to transmit data in the mode ()?

Options:

A.

48

B.

52

C.

54

D.

56

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Total 297 questions