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H12-311_V3.0 Sample Questions Answers

Questions 4

CCMP Encryption ratio TKIP Encryption security is high because of ().

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.

Added message integrity check mechanism

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Questions 5

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

Options:

A.

1024

B.

256

C.

512

D.

128

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Questions 6

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 7

2.4 GHz How many channels () can the frequency band be divided into at most?

Options:

A.

14

B.

13

C.

11

D.

3

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Questions 8

WEP The encrypted data algorithm uses () algorithm.

Options:

A.

RC4

B.

AES

C.

CCMP

D.

Asymmetric encryption

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Questions 9

Which of the following is correct about the power calculation ()?

(Select 3 Answers)

Options:

A.

0 dBm = 1 mW

B.

3 dBm = 2 mW

C.

10 dBm = 100mW

D.

27 dBm = 500mW

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Questions 10

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 11

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

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Questions 12

thin AP In the networking, which of the following authentication methods is not required in the authentication process AC participate().

Options:

A.

Shared key authentication

B.

802.1X Certification

C.

PSK Certification

D.

Portal Certification

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Questions 13

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

Options:

A.

True

B.

False

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Questions 14

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

Options:

A.

manage VLAN

B.

Serve VLAN

C.

user VLAN

D.

Certification VLAN

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Questions 15

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

Options:

A.

AIFSN

B.

SIFS

C.

DIFS

D.

TXOPLimit

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Questions 16

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

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Questions 17

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

Options:

A.

True

B.

False

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Questions 18

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

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Questions 19

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

Options:

A.

4

B.

0

C.

8

D.

10

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Questions 20

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

Options:

A.

True

B.

False

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Questions 21

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

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Questions 22

20dBm Equivalent to () mW .

Options:

A.

100

B.

200

C.

500

D.

1000

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Questions 23

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

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Questions 24

Regarding the networking mode, the following description is correct ().

Options:

A.

Compared with the three-layer network, the two-layer network is more suitable for large-scale networks such as parks and stadiums.

B.

The advantage of the three-layer network is simple configuration and easy networking

C.

if AC The ability to process data is relatively weak, it is recommended to use bypass networking

D.

In a direct-connected network, AP Business data can not go through AC And directly reach the upstream network

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Questions 25

QoS What kinds of service models are included ()

(Select 3 Answers)

Options:

A.

Best Effort Model

B.

IntServ Model

C.

FIFO Model

D.

DiffServ Model

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Questions 26

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

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Questions 27

Radio frequency mainly uses spread spectrum technology. Which of the following technologies belong to spread spectrum technology ()? (Select 2 Answers)

Options:

A.

FHSS

B.

DSSS

C.

QPSK

D.

OFDM

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Questions 28

In theory, the network cable used in the project cannot exceed ()rice.

Options:

A.

50

B.

80

C.

100

D.

150

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Questions 29

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 30

Among the following encryption methods, the most secure is ()

Options:

A.

Plaintext encryption

B.

WEP encryption

C.

TKIP encryption

D.

CCMP encryption

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Questions 31

Metal objects have a greater attenuation effect on wireless signals, AP Or the antenna should not be placed behind a metal ceiling, etc.

Options:

A.

True

B.

False

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Questions 32

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

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Questions 33

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 34

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= ().

Options:

A.

-57

B.

-56

C.

-55

D.

-54

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Questions 35

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

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Questions 36

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 37

IEEE It is the standards organization responsible for the use of wireless frequencies in the United States.

Options:

A.

True

B.

False

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Questions 38

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

Options:

A.

True

B.

False

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Questions 39

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

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Questions 40

Regarding the telnet management of AC6605, the following statement is wrong ().

Options:

A.

telnet is a way to remotely manage AC

B.

The telnet service is turned off by default on the AC

C.

telnet service can be configured separately on the wired side and wireless side of AC

D.

telnet can be authenticated based on user name and password, and the transmission is encrypted, so it is quite safe

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Questions 41

Wireless network engineer WLAN When planning the network, use RF The purpose of simul-ation is (). (Select 3 Answers)

Options:

A.

Analog signal coverage effect, find blind spots

B.

Obtain the field strength distribution of different locations

C.

Get the current signal-to-noise ratio of different locations

D.

Get available bandwidth in different locations

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Questions 42

PPPoE Certified in WLAN When used, and WLAN The authentication encryption used by itself does not matter.

Options:

A.

True

B.

False

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Questions 43

Huawei eSight Network management wizard-style configuration WLAN Business needs to be added in the network management first AC equipment.

Options:

A.

True

B.

False

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Questions 44

Same user VLAN And the same SSID All wireless users can access the Internet, but they can’t access each other. What may be the cause of this phenomenon ()?

Options:

A.

Configured on the user’s gateway device ACL , Which prevents mutual access between users

B.

AC Configured on ACL , Which prevents mutual access between users

C.

Access AP Port isolation configured on the switch prevents mutual access between users

D.

wireless service-set User isolation is configured on the computer to prevent mutual access between users

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Exam Code: H12-311_V3.0
Exam Name: HCIA-WLAN V3.0
Last Update: Feb 23, 2024
Questions: 297
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