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H12-311_V3.0 HCIA-WLAN V3.0 Questions and Answers

Questions 4

For the choice of WLAN coverage antennas, it is recommended to choose () for long and narrow areas, and () for wide and short-distance areas.

Options:

A.

Omnidirectional antenna; Omnidirectional antenna

B.

Omnidirectional antenna; directional antenna

C.

Directional antenna; omnidirectional antenna

D.

Directional antenna; Directional antenna

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Questions 5

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

Options:

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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Questions 6

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

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Questions 7

AAA It is a management framework, which is commonly used to implement () protocol.

Options:

A.

RADIUS

B.

CAPWAP

C.

802.11a/b/g/n

D.

802.1X

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Questions 8

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

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Questions 9

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

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Questions 10

Which of the following is IEEE A wireless local area network standard originally formulated ()?

Options:

A.

IEEE 802.11

B.

IEEE 802.10

C.

IEEE 802.12

D.

IEEE 802.16

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Questions 11

AC6605 supports three ways to establish AP and AC intercommunication, what are the differences ()?

(Select 3 Answers)

Options:

A.

Add AP offline

B.

Automatically discover the AP and go online normally

C.

Automatically discover AP and confirm to go online

D.

Find APs through multicast and go online automatically

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Questions 12

802.11 In the frame, RTS and CTS What is the interframe interval between ()?

Options:

A.

SIFS

B.

IFS

C.

DIFS

D.

PIFS

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Questions 13

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

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Questions 14

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

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Questions 15

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

Options:

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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Questions 16

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

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Questions 17

AC Perform the load balancing process according to () information.

Options:

A.

AP Periodically to AC Send its associated STA Information

B.

STA Periodically report the current associated AP Logo

C.

AC Timed query AP Associated STA number

D.

STA Periodically search the surrounding AP Information and through association AP Report AP Logo

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Questions 18

Which of the following options is correct ()? (Select 3 Answers)

Options:

A.

SSID Technology can divide a wireless local area network into several sub-networks that require different authentication. Each sub-network requires independent

authentication. Only users who pass the authentication can enter the corresponding sub-network to prevent unauthorized users from entering This network.

B.

BSSID Is actually AP of MAC Address, used to identify AP Managed BSS , In the same AP Inside BSSID and SSID One-to-one mapping.

C.

Users can be in different SSID Roaming is realized below.

D.

in a ESS Inside SSID Is the same, but for ESS Within each AP Corresponding BSSID Are not the same. If oneAP Can support multiple at the

same time SSID , Then AP Will assign different BSSID To correspond to these SSID .

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Questions 19

If a AP Has been added offline, then AP You can go online directly.

Options:

A.

True

B.

False

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Questions 20

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

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Questions 21

Single area WLAN When planning, influence AP The factors of the number of deployment are ().

(Select 3 Answers)

Options:

A.

Number of people connected in the area

B.

Area size

C.

Field strength and bandwidth requirements

D.

Number of network ports

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Questions 22

At present, the security policy based on user authentication that is widely used in the enterprise

network is () (Select 2 Answers)

Options:

A.

WPA1 PSK+TKIP/CCMP

B.

WPA1 802.1X+TKIP/CCMP

C.

WPA2 PSK+TKIP/CCMP

D.

WPA2 802.1X+TKIP/CCMP

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Questions 23

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

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Questions 24

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

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Questions 25

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

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Questions 26

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

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Questions 27

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

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Questions 28

In the WDS point-to-point network, the backbone link between Root AP and Leaf AP is connected in the 5GHz frequency band. The frequency band is 149. Which of the following frequency bands () should Leaf AP use?

Options:

A.

149

B.

153

C.

157

D.

Apart from 149 It will be all right

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Questions 29

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

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Questions 30

Huawei AC6605 What is the command to switch between the wired side and the wireless side ()?

Options:

A.

Ctrl+B

B.

Ctrl+X

C.

Ctrl+Y

D.

Ctrl+Z

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Questions 31

Is the following statement about the introduction of frequency planning correct ()?

(Select 2 Answers)

Options:

A.

2.4GHz generally uses 1, 6, 11 three non-overlapping channels for coverage

B.

In China, 5GHz generally has 23 non-overlapping channels available

C.

Microwave interference will occur in the entire 2.4GHz frequency band

D.

If the AP is dual-band, it is recommended to use the 5G priority function

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Questions 32

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

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Questions 33

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

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Questions 34

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

Options:

A.

RF template

B.

AP template

C.

ESS template

D.

Planning table template

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Questions 35

802.11n MAC Which of the following are included in the layer improvement

technology ()? (Select 2 Answers)

Options:

A.

Frame aggregation technology

B.

MIMO Technology

C.

Block confirmation technology

D.

Beamforming technology

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Questions 36

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

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Questions 37

For the polarization of electromagnetic waves, which of the following descriptions is correct is (). (Select 3 Answers)

Options:

A.

The antenna radiates electromagnetic waves to the surrounding space

B.

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

, The direction of the electric field changes according to a certain rule

C.

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

D.

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

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Questions 38

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

Options:

A.

IBSS

B.

BSS

C.

ESS

D.

NSS

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Questions 39

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

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Questions 40

Which of the following options are the basic functions of configuring Huawei wireless

controllers ()? (Select 3 Answers)

Options:

A.

Configuration AC-ID

B.

Configuration Radio template

C.

Configuration AC Country code

D.

Configuration AC of WLAN Source interface

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Questions 41

WLAN What are the working frequency bands ()? (Select 2 Answers)

Options:

A.

2 GHz

B.

5 GHz

C.

5.4 GHz

D.

2.4 GHz

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Questions 42

Which of the following rates is not 802.11a. The rate supported by the protocol ()?

Options:

A.

6Mbps

B.

12Mbps

C.

24Mbps

D.

30Mbps

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Questions 43

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

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Questions 44

exist 802.11 In the frame, which type of message is used by the terminal to receive data packets in the power-saving mode?

Options:

A.

RTS

B.

CTS

C.

ACK

D.

PS-Poll

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Exam Code: H12-311_V3.0
Exam Name: HCIA-WLAN V3.0
Last Update: Nov 21, 2024
Questions: 297
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