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Home > Huawei > HCIA-WLAN > H12-311_V3.0

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

Question # 4

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 # 5

pass through FTP Way to upgrade AP, You need to ensure AP and FTP Servers can communicate with each other, and AP Put the upgrade file in FTP Root directory.

A.

True

B.

False

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Question # 6

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 # 7

IEEE 802.11 The standard used to define roaming is ().

A.

IEEE 802.11c

B.

IEEE 802.11h

C.

IEEE 802.11j

D.

IEEE 802.11r

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Question # 8

an examination AC What is the command for online users ()?

A.

display users all

B.

display user-interface console 0

C.

display local-user

D.

display access-user

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Question # 9

WLAN When configuring the network, WMM Which of the following templates should the template be bound to ()?

A.

radio-profile

B.

traffic-profile

C.

security-profile

D.

service-set

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Question # 10

According to the following configuration example, the following statement is correct ().

[AC] dhcp enable

[AC] interface VLANif100

[AC-VLANif100] ip address 10.1.100.1 24

[AC-VLANif100] dhcp select interface

[AC-VLANif100] quit

A.

The DHCP service is already enabled by default in the global mode, so dhcp enable does not need to be configured

B.

The dhcp select interface command is to enable the DHCP client function on the VLAN 100 interface

C.

If VLAN100 is a user VLAN, after the user receives the address, the gateway is 10.1.100.1 and the mask is 255.255.255.0

D.

If VLAN100 is the management VLAN where the AP is located, the option 43 field in the DHCP message that the AP will receive should be 10.1.100.1

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Question # 11

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 # 12

AP If you want to pass DNS Server fetch AC of IP Address, first get your own IP address,DHCP Server and DNS of IP address.

A.

True

B.

False

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Question # 13

In a dual-link backup network, AP According to what distinguishes the main use AC And spare AC of()?

(Select 3 Answers)

A.

priority

B.

AC of IP address

C.

AC Load condition

D.

AC response AP Time of day

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Question # 14

The following description of TKIP encryption is wrong ().

A.

The length of IV used in TKIP encryption is 24 bits

B.

TKIP encryption uses the same encryption algorithm as WEP encryption

C.

The motivation for developing TKIP encryption is to upgrade the security of the old WEP hardware

D.

TKIP encryption adds the mechanism of Key generation, management and transmission

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Question # 15

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 # 16

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

A.

150 Mbps

B.

300 Mbps

C.

450 Mbps

D.

600 Mbps

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Question # 17

Which of the following commands connect Huawei to the switch

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

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Question # 18

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 # 19

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 # 20

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 # 21

A 10 Floors of buildings need to be covered WLAN Signal, because taking into account the floor block,

which can be set to 6 channel.

5,6 Layered WLAN Signal frequency

A.

True

B.

False

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Question # 22

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

A.

True

B.

False

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Question # 23

In huawei eSight The maximum number of layers supported by the location topology in the network management system is layer ().

A.

7

B.

8

C.

9

D.

10

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Question # 24

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 # 25

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 # 26

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

A.

PSE

B.

PD

C.

PI

D.

PSU

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Question # 27

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

A.

True

B.

False

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Question # 28

TKIP Encryption ratio WEP Encryption security is high because of (). (Select 3 Answers)

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.

Adopt a stronger data verification algorithm

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Question # 29

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

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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Question # 30

802.11a What are the supported rates ()?

A.

6,12,24,54 Mbps

B.

6, 9, 12, 18, 24, 36, 48, 54 Mbps

C.

6,12,18,24,36,48,54 Mbps

D.

6,9,12,18,24,30,36,48,54 Mbps

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Question # 31

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

A.

FHSS

B.

DSSS

C.

QPSK

D.

OFDM

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Question # 32

WLAN The signal passes through which of the following materials with less penetration loss (). (Select 2 Answers)

A.

Gypsum board

B.

Glass window (colorless)

C.

Concrete wall

D.

Brick wall

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Question # 33

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

A.

RF template

B.

AP template

C.

ESS template

D.

Planning table template

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Question # 34

Which of the following statements about region is correct ()?

(Select 3 Answers)

A.

APs belonging to the same region will uniformly adjust the radio frequency channel and power

B.

An AP can belong to two regions at the same time, so that roaming is more optimized

C.

If there is no configuration, all APs belong to region 0 by default

D.

AP region has three types of deployment: dense deployment, discrete deployment, and ordinary deployment.

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Question # 35

When a hardware failure occurs in an AP in the network, in order to avoid data reconfiguration, the user can quickly complete the AP replacement by configuring the AP.

replace.

A.

True

B.

False

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Question # 36

To the following WLAN In the description of the network diagram, the error is ().

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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Question # 37

802.11 In the frame, Frame Control In position Type What is the correct correspondence with the frame format ()?

A.

Type for 01 Time represents data frame

B.

Type for 10 Time represents control frame

C.

Type for 00 Indicates reserved use

D.

Type for 00 Time represents management

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Question # 38

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

A.

True

B.

False

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Question # 39

AP The systematic process of radio frequency resource management is ().

A.

Acquisition -> Decision -> Analysis -> Execution

B.

Analysis -> Acquisition -> Decision -> Execution

C.

Acquisition -> Analysis -> Execution -> Decision

D.

Acquisition -> Analysis -> Decision -> Execution

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Question # 40

Which of the following is a restart AC6605 The command()?

A.

reload

B.

reboot

C.

[Quidway]reload

D.

[Quidway] reboot

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Question # 41

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 # 42

because 802.11a The maximum rate supported is the same as 802.11g. The maximum rate supported is the same, so 802.11a Protocol is backward compatible 802.11g Agreement.

A.

True

B.

False

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Question # 43

To obtain better coverage, try to use AP Signal can ( ) Through the wall.

A.

vertical

B.

parallel

C.

45°

D.

60°

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Question # 44

802.11g What rates can be supported?

A.

1,2,5.5,11&6,9,12,18,24,30,36,48,54 Mbps

B.

6, 9, 12, 18, 24, 36, 48, 54 Mbps

C.

1,2,5.5,11&6,9,12,18,24,36,48,54 Mbps

D.

6,9,12,18,24,30,36,48,54 Mbps

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