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H12-311_V3.0 Exam Dumps - HCIA-WLAN V3.0

Question # 4

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

A.

WiFi

B.

WAPI

C.

WLAN

D.

WiMAX

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Question # 5

WLAN middle,AP It has been working in a half-duplex state.

A.

True

B.

False

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Question # 6

Huawei Box Wireless Controller AC6605 support twenty four Piece PoE Interface in WLAN Can be directly connected when networking AC of AP Make a supply

Electricity.

A.

True

B.

False

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Question # 7

WLAN AP It can be powered by ().

(Select 3 Answers)

A.

POE switch

B.

POE switcher

C.

Independent power adapter

D.

RF cable

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Question # 8

Spread spectrum ( spread-spectrum ) Technology is to use ISM The basis of frequency band transmission of wireless data.

A.

True

B.

False

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Question # 9

about" AP6010DN

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

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Question # 10

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

A.

True

B.

False

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Question # 11

AP What factors are related to the coverage (). (Select 3 Answers)

A.

AP Transmit power

B.

Antenna gain

C.

AP Size

D.

Transmission loss

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Question # 12

Which of the following technologies work at 5 GHz ()? (Select 2 Answers)

A.

radar

B.

Bluetooth

C.

Infrared

D.

Digital satellite

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Question # 13

If the terminal supports 5GHz and 2.4GHz Function, then AP Can be configured to control this kind of terminal priority access 5GHz .

A.

True

B.

False

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Question # 14

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

A.

eSight server

B.

Client

C.

Authenticator

D.

Authentication server

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Question # 15

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

A.

2.4 GHz

B.

900 MHz

C.

2.0 GHz

D.

5 GHz

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Question # 16

WEP The encrypted data algorithm uses () algorithm.

A.

RC4

B.

AES

C.

CCMP

D.

Asymmetric encryption

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Question # 17

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.

A.

True

B.

False

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Question # 18

for dBm ,dB,dBi, The following description is correct ().

(Select 3 Answers)

A.

dBm : Absolute value of characterizing power

B.

dBi and dBd : Characterize the relative value of gain

C.

dB : The relative value of characterizing power

D.

If the antenna of A is 12dBi , The second antenna is 14dBi , It can be said that A is smaller than B 2dBi

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Question # 19

Which configuration methods does the wireless controller support ()?

(Select 3 Answers)

A.

telnet Configuration

B.

console Port configuration

C.

pass through eSight Configuration

D.

LLDP Configuration

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Question # 20

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

A.

Beacon frame

B.

Probe Request frame

C.

Authentication Request frame

D.

Association Request frame

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Question # 21

The omnidirectional antenna appears on the horizontal pattern as ()Spend.

A.

90

B.

180

C.

360

D.

0

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Question # 22

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

()? (Select 3 Answers)

A.

mac-auth

B.

sn-auth

C.

no-auth

D.

mac-sn-auth

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Question # 23

STA issued 802.11 Message to pass AP When entering the Ethernet, it is converted to 802.3 Packets that are not in the priority mapping method are

().

A.

No priority mapping

B.

According to different VAP Set different priorities

C.

Arrive according to the message AP Precedence

D.

according to UP Map to priority

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Question # 24

For the lobe width, which of the following descriptions is correct is (). (Select 3 Answers)

A.

Within the range of the main lobe, the power density relative to the maximum radiation direction is reduced by half (3dB) Angle

B.

The narrower the lobe width, the better the directivity, the longer the radiation distance, the stronger the anti-interference ability

C.

The pattern usually has two or more lobes

D.

Only within the coverage of the half power angle, the terminal can receive the signal

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Question # 25

Not loaded license Time AC6605 Supported by default AP The number is ().

A.

4

B.

0

C.

8

D.

10

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Question # 26

if AP The transmit power is 1mW , Converted to dBm After () dBm.

A.

20

B.

1

C.

0

D.

10

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Question # 27

Which two of the following are PoE The power supply standard ()? (Select 2 Answers)

A.

IEEE 802.3ae

B.

IEEE 802.3af

C.

IEEE 802.3as

D.

IEEE 802.3at

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Question # 28

Used as AP and AC Establish CAPWAP tunnel VLAN What is it VLAN ()?

A.

manage VLAN

B.

Serve VLAN

C.

user VLAN

D.

Certification VLAN

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Question # 29

Which of the following descriptions of power splitters and couplers are correct is ().

A.

Power divider and coupler are equal power distribution

B.

The power divider is equal power distribution, and the coupler is unequal power distribution

C.

The power divider is unequal power distribution, and the coupler is equal power distribution

D.

Power divider and coupler are unequal power distribution

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Question # 30

The index used to describe the degree of antenna convergence of the transmit power is (

A.

Broadband

B.

power

C.

Gain

).

D.

polarity

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Question # 31

AP Transmit power 20dBm , Antenna gain 4dBi , Cable and device loss 1dB , Terminal receiving antenna gain 2dBi , Space propagation loss 80dB , Terminal receiving level RSSI= ().

A.

-57

B.

-56

C.

-55

D.

-54

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Question # 32

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

A.

802.11a

B.

802.11b

C.

802.11g

D.

802.11n

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Question # 33

20dBm Equivalent to () mW .

A.

100

B.

200

C.

500

D.

1000

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Question # 34

About Huawei WLAN Description of the characteristics of the product, the following statement is correct ().

A.

Wireless controllers can achieve high availability through stacking

B.

Huawei AP The radio frequency tuning function is divided into global tuning and local tuning. The local tuning is AP Done independently

C.

WLAN The switching threshold of load balancing has two configurations based on the number of users and the number of sessions.

D.

After dual-link backup is configured, if the user adopts the tunnel forwarding mode, even if it is active AC User services will not be interrupted after failure and restart

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Question # 35

802.11 There are three frame types, namely (). (Select 3 Answers)

A.

Data Frame

B.

Control frame

C.

Business frame

D.

Management frame

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Question # 36

Which of the following are the relevant parameters of the Traffic template ().

(Select 2 Answers)

A.

802.3 priority mapping strategy

B.

CAC strategy

C.

Tunnel priority mapping strategy

D.

ACK strategy

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Question # 37

For one adopts WPA2 PSK Certified and SSID For broadcast wireless networks, users can double-click the username and password to access the network. SSID And enter the correct use

A.

True

B.

False

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Question # 38

The distance between the center frequencies of the two channels is less than or equal to

In order to avoid adjacent channel interference during domain channel planning, the same channel is not allowed to be used.

25MHz When there is an overlapping area between the channels, there will be some interference, so in the adjacent area

A.

True

B.

False

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Question # 39

Which of the following descriptions of management VLAN is correct is ().

A.

Mainly responsible for transmitting data when WLAN users go online

B.

PVID VLAN under the WLAN ESS interface

C.

Service VLAN under the service set template

D.

Responsible for the establishment of the CAPWAP tunnel between AC and AP

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Question # 40

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

A.

RTS

B.

CTS

C.

ACK

D.

PS-Poll

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Question # 41

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

A.

802.11a

B.

802.11g

C.

802.11e

D.

802.11s

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Question # 42

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

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

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Question # 43

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

A.

Frame Control

B.

Duration

C.

Address Bit

D.

Fragment number

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Question # 44

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

A.

48

B.

52

C.

54

D.

56

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