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H12-311_V3.0 Questions and Answers

Question # 4

exist 1 Floor deployment 3 Piece AP, The channels from left to right are 1,6,11, At this time 2 Floor deployment 3 Piece AP Channel should be be divided into( ).

A.

1 ,6,11

B.

2 ,7,12

C.

6 ,11,1

D.

11 ,6,1

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Question # 5

802.11 Frame, when the network uses WDS When the model is signaled, To DS and From DS What are the values of ()?

A.

0,0

B.

0,1

C.

1,0

D.

1,1

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Question # 6

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

A.

True

B.

False

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Question # 7

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

A.

Ctrl+B

B.

Ctrl+X

C.

Ctrl+Y

D.

Ctrl+Z

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Question # 8

Each AC Equipment needs to be specified AC The source of IP Address for peace AP Establish CAPWAP Tunnel, one AC You can specify up to 2 Piece WLAN source IP.

A.

True

B.

False

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Question # 9

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 # 10

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

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

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Question # 11

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 ()?

A.

Convergence layer three switches

B.

One-arm router

C.

AC superior

D.

AP superior

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Question # 12

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

controllers ()? (Select 3 Answers)

A.

Configuration AC-ID

B.

Configuration Radio template

C.

Configuration AC Country code

D.

Configuration AC of WLAN Source interface

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Question # 13

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

A.

PSE

B.

PD

C.

PI

D.

PSU

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Question # 14

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

AP

A.

SSID

B.

ESSID

C.

BSSID

D.

BSA

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Question # 15

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

(Select 3 Answers)

A.

Micro-wave oven

B.

remote control

C.

cordless phone

D.

Bluetooth transmission equipment

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Question # 16

TKIP encrypted IV the length of the vector is () bit.

A.

12

B.

24

C.

48

D.

64

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Question # 17

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.

A.

True

B.

False

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Question # 18

The electrical performance indicators of the antenna include ().

(Select 3 Answers)

A.

Gain

B.

Lobe width

C.

Power size

D.

Polarization mode

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Question # 19

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

A.

AIFSN

B.

SIFS

C.

DIFS

D.

TXOPLimit

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Question # 20

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 # 21

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

A.

access

B.

hybrid

C.

trunk

D.

eth-trunk

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Question # 22

The following statement about the AP access control method is incorrect ().

(Select 2 Answers)

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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Question # 23

QoS What kinds of service models are included ()

(Select 3 Answers)

A.

Best Effort Model

B.

IntServ Model

C.

FIFO Model

D.

DiffServ Model

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Question # 24

There are four wireless STA, According to the following backoff time parameters, which workstation has the priority to occupy the channel?

A.

5

B.

7

C.

4

D.

6

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Question # 25

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

technology ()? (Select 2 Answers)

A.

Frame aggregation technology

B.

MIMO Technology

C.

Block confirmation technology

D.

Beamforming technology

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Question # 26

The following command can configure the port of the Huawei switch as hybrid model()?

A.

swichport hybrid

B.

hybrid enable

C.

port link-type hybrid

D.

port mode hybrid

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Question # 27

User number 300 People, concurrency rate 70% , Terminal support 2.4GHz and 5GHz Frequency band, in accordance with each AP Maximum number of dual-band access users40 people

Consider, need at least () AP Able to meet capacity requirements?

A.

5

B.

6

C.

7

D.

8

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Question # 28

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 # 29

802.11 In the frame, it is used to record the network allocation vector ( NAVWhat is the value of ()?

A.

Frame Control

B.

Duration

C.

address Bit

D.

Sequence control bit

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Question # 30

Among the following options, () is the reason for using 5G priority access.

A.

It is easier to make network planning in the 5G frequency band

B.

5G frequency band can provide better access capability and capacity

C.

The connection speed between users and APs in the 5G frequency band is very fast

D.

The transmission rate of the 5G frequency band is higher than that of the 2.4G frequency band

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Question # 31

single AP What is the area covered ()?

A.

BSA

B.

ESA

C.

SSA

D.

TSA

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Question # 32

Defined WLAN Medium service quality 802.11 The agreement is ().

A.

802.11f

B.

802.11i

C.

802.11e

D.

802.11n

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Question # 33

Antennas are classified according to directivity and can be divided into () antennas and () antennas.

(Select 2 Answers)

A.

Plate

B.

paraboloid

C.

Omnidirectional

D.

Orientation

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Question # 34

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?

A.

149

B.

153

C.

157

D.

Apart from 149 It will be all right

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Question # 35

Among the following options, which factors will cause users to be unable to search for wireless network signals ()? (Select 2 Answers)

A.

AP Configured 5G Priority, leading to 2.4G Wireless client cannot find the signal

B.

The user's wireless network card is not enabled or the hardware switch of the wireless network card is not turned on

C.

The wireless controller is equipped with user isolation function

D.

The user's wireless network card driver is abnormal

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Question # 36

DSSS The modulation methods used are BPSK and QPSK .

A.

True

B.

False

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Question # 37

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

A.

Management frame

B.

Control frame

C.

Data Frame

D.

Empty data frame

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Question # 38

Various pipes, metal keels and aluminum alloy gussets in the ceiling will have a greater impact on the actual signal coverage effect.

A.

True

B.

False

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Question # 39

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

A.

True

B.

False

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Question # 40

Huawei Wireless AP What are the two upgrade modes download ()? (Select 2 Answers)

A.

AC download

B.

FTP Server download

C.

AP Bring your own

D.

BAS

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Question # 41

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

network is () (Select 2 Answers)

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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Question # 42

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 # 43

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 # 44

MIMO(Multiple input and multiple output) The client can use at most 3 Two spatial streams transmit data at the same time, and the maximum theoretical rate can reach , That is, multiple input and multiple output, using 600Mbps . 802.11n Technology wireless access point and guest

A.

True

B.

False

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