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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

Question 1

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 2

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

Options:

A.

True

B.

False

Question 3

Which is the longest interval between 802.11 frames ()?

Options:

A.

SIFS

B.

IFS

C.

DIFS

D.

PIFS

Question 4

A large number of devices appear AP and AC How to deal with the version mismatch failure ().

Options:

A.

Upgrade the versions to match each other

B.

replace AP equipment

C.

Replace the switch

D.

an examination POE Is the power supply normal

Question 5

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 6

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 7

The 802.11 physical layer standard defines some common operations on the physical layer of wireless networks: such as QoS, security, and roaming operations.

Options:

A.

True

B.

False

Question 8

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 9

802.11b Support () channels in the United States, among which () channels do not overlap?

Options:

A.

14 ; 3

B.

11; 3

C.

11 ; 6

D.

14 ; 6

Question 10

Which of the following commands connect Huawei to the switch

Options:

A.

interface GigabitEthernet 0/0/1

port link-type access

GE 0/0/1 Port added to VLAN100 middle()?

port default VLAN 100 B. interface

GigabitEthernet 0/0/1 port link-type

access

port allow-pass VLAN 100

B.

interface GigabitEthernet 0/0/1

port link-type trunk

trunk allow-pass VLAN 100

C.

interface GigabitEthernet 0/0/1

port link-type trunk

VLAN 100

Question 11

AP The size of the coverage area is controlled by ().

(Select 2 Answers)

Options:

A.

adjust AP Antenna angle

B.

adjust AP Transmit power

C.

adjust AP Power supply

D.

adjust AP Access bandwidth

Question 12

Which modulation method is the picture below ()?

Options:

A.

AM

B.

FM

C.

phase modulation

D.

Wave modulation

Question 13

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

quantity.

Options:

A.

True

B.

False

Question 14

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

Options:

A.

True

B.

False

Question 15

If one 802.11n of AP support 2*2 of MIMO Technology, then this AP What is the theoretical rate of ()?

Options:

A.

150 Mbps

B.

300 Mbps

C.

450 Mbps

D.

600 Mbps

Question 16

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 17

support 5GHz What are the wireless LAN standards for frequency

bands ()? (Select 2 Answers)

Options:

A.

802.11a

B.

802.11b

C.

802.11g

D.

802.11n

Question 18

Which of the following ports can only belong to 1 Piece VLAN ().

Options:

A.

access

B.

hybrid

C.

trunk

D.

eth-trunk

Question 19

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 20

MIMO The antenna configuration is usually expressed as " M*N ",in M and N What does each mean ()?

(Select 2 Answers)

Options:

A.

M Indicates the number of transmission antennas

B.

N Indicates the number of transmission antennas

C.

N Indicates the number of receiving antennas

D.

M Indicates the number of receiving antennas

Question 21

display ap all Command can be viewed AP of MAC ,Type And running status.

Options:

A.

True

B.

False

Question 22

Huawei Wireless Controller AC6605 The upgrade operation can only be performed on the wired side of the controller.

Options:

A.

True

B.

False

Question 23

Which of the following options belong EDCA Parameters? (Select 2 Answers)

Options:

A.

AIFSN

B.

SIFS

C.

DIFS

D.

TXOPLimit

Question 24

What are the prerequisites for users to achieve three-tier roaming ()?

(Select 3 Answers)

Options:

A.

The two APs that the user roams over must have the same SSID

B.

The two APs for user roaming switching must have the same VLAN

C.

User roaming requires two AP signals to cover overlapping areas

D.

The SSID released by the two APs of the user roaming handover must have the same authentication method

Question 25

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 26

If one wireless client connects to two AP identical SSID Next, what is used to determine which wireless terminal is connected to? ()?

AP

Options:

A.

SSID

B.

ESSID

C.

BSSID

D.

BSA

Question 27

The following statement is correct ().

(Select 3 Answers)

Options:

A.

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

B.

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

Go through the certification process

C.

WPA2 uses 802.1X authentication

D.

WAPI is China's national standard system for wireless LAN

Question 28

802.11 What parameters are used in the frame to reorganize the frame segment ()?

Options:

A.

Frame Control

B.

Duration

C.

Address Bit

D.

Fragment number

Question 29

CAPWAP The agreement is made by IEEE Standards organization in 2009 year 4 One of the month WLAN Standard for AC And thin AP Communication between.

Options:

A.

True

B.

False

Question 30

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 31

WEP The encrypted data algorithm uses () algorithm.

Options:

A.

RC4

B.

AES

C.

CCMP

D.

Asymmetric encryption

Question 32

Which of the following statements about antenna classification is correct ()? (Select 2 Answers)

Options:

A.

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

B.

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

C.

Classified by purpose: short wave antenna, ultra short wave antenna, microwave antenna, etc.

D.

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

Question 33

If changed AP The configuration parameters of the radio must be restarted AP The order can only take effect.

Options:

A.

True

B.

False

Question 34

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 35

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 36

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

Options:

A.

True

B.

False

Question 37

The two commonly used units to describe antenna gain are dBi and dBd , The conversion relationship between them is: dBi=dBd+2.14 .

Options:

A.

True

B.

False

Question 38

For protection WLAN Security, which of the following measures can be taken? (Select 3 Answers)

Options:

A.

Authentication

B.

encryption

C.

System protection

D.

Control flow

Question 39

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

Options:

A.

Beacon frame

B.

Probe Request frame

C.

Authentication frame

D.

Association Request frame

Question 40

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

Options:

A.

PSE

B.

PD

C.

PI

D.

PSU

Question 41

exist WLAN middle ACK What type of frame() does the frame belong to?

Options:

A.

Management frame

B.

Control frame

C.

Data Frame

D.

Empty data frame

Question 42

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

Options:

A.

True

B.

False

Question 43

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 44

A company wants to deploy WLAN, the company has purchased a batch of wireless APs that support 802.11n, when WLAN is deployed, only support Only 802.11n wireless clients can connect to the company's WLAN

Options:

A.

True

B.

False

Page: 1 / 30
Total 297 questions