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H12-311_V3.0 Sample Questions Answers

Questions 4

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

().

Options:

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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Questions 5

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

Options:

A.

90

B.

180

C.

360

D.

0

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Questions 6

BSS Which two basic service sets are included ()? (Select 2 Answers)

Options:

A.

Independent basic service set

B.

Basic Service Set of Infrastructure Mode

C.

Extend the basic service set

D.

Extend the basic service set of structural mode

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Questions 7

Among the following priority queues, the () queue has the highest default priority.

Options:

A.

AC-BE

B.

AC-VI

C.

AC-VO

D.

AC-BK

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Questions 8

Capacity planning mainly starts from the aspects of equipment performance, number of users, bandwidth requirements, and wireless environment, and estimates the amount required to meet the business volume. AP number

quantity.

Options:

A.

True

B.

False

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Questions 9

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 10

The lobe width is a very important parameter commonly used in directional antennas. It refers to the width of the antenna's radiation pattern below the peak (.)dB The angle of the premises

Options:

A.

3

B.

4

C.

5

D.

6

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Questions 11

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.

Options:

A.

True

B.

False

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Questions 12

original 802.11 What is the maximum rate supported by the protocol Mbps ()?

Options:

A.

1

B.

2

C.

5.5

D.

11

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Questions 13

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

Options:

A.

True

B.

False

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Questions 14

If an enterprise’s wireless network networking mode is direct forwarding, then thin and then transfer the message CAPWAP Encapsulate, pass CAPWAP The tunnel transmits this data message to AP can 802.11 Data messages are converted into Ethernet messages, AC.

Options:

A.

True

B.

False

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Questions 15

exist WDS In the deployment, what kinds of bridge networking modes are included ()? (Select 3 Answers)

Options:

A.

Point-to-point method

B.

Point-to-multipoint

C.

Relay bridging method

D.

Multipoint to multipoint

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Questions 16

In order to facilitate management and maintenance, AP The power supply mode is generally preferred to select () for power supply.

Options:

A.

Independent power adapter

B.

POE switch

C.

POE adapter

D.

AC power supply

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Questions 17

A large number of devices appear AP and AC How to deal with the version mismatch failure ().

Options:

A.

Upgrade the versions to match each other

B.

replace AP equipment

C.

Replace the switch

D.

an examination POE Is the power supply normal

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Questions 18

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

Options:

A.

7

B.

8

C.

9

D.

10

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Questions 19

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

Options:

A.

True

B.

False

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Questions 20

The antenna gains gain through ().

Options:

A.

Use power amplifiers in antenna systems

B.

Make the antenna radiation more concentrated

C.

Use high-efficiency antenna feeder

D.

Use equipment with low standing wave ratio

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Questions 21

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.

Options:

A.

True

B.

False

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Questions 22

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 23

exist WDS In the networking, it is connected to AC connected AP What is usually called ()?

Options:

A.

Leaf AP

B.

Middle AP

C.

Master AP

D.

Root AP

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Questions 24

Which technology belongs to the wireless metropolitan area network () below?

Options:

A.

2G/3G

B.

WLAN

C.

Bluetooth

D.

WiMAX

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Questions 25

In a point-to-multipoint networking environment, one device serves as the central device, and all other devices only establish wireless bridges with the central device to realize the interconnection of multiple networks. The disadvantage is that the intercommunication of multiple branch networks must be forwarded through the central bridge device.

Options:

A.

True

B.

False

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Questions 26

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 27

thin AP Find AC In the process, the first step is AP Check if there is pre-configured static AC of IP List.

Options:

A.

True

B.

False

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Questions 28

MIMO The antenna configuration is usually expressed as " M*N ",in M and N What does each mean ()?

(Select 2 Answers)

Options:

A.

M Indicates the number of transmission antennas

B.

N Indicates the number of transmission antennas

C.

N Indicates the number of receiving antennas

D.

M Indicates the number of receiving antennas

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Questions 29

AP Unavailable IP Common reasons for addresses are (). (Select 3 Answers)

Options:

A.

Incorrect address pool configuration

B.

Address pool exhausted

C.

Intermediate network problem

D.

POE Power failure

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Questions 30

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

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.

Adopt a stronger data verification algorithm

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Questions 31

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

Options:

A.

48

B.

52

C.

54

D.

56

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Questions 32

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

Options:

A.

True

B.

False

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Questions 33

Which of the following 2.4GHz The frequency bands are non-overlapping

channels (). (Select 3 Answers)

Options:

A.

6 and 11

B.

3 and 8

C.

4 and 8

D.

4 and 10

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Questions 34

an examination AP What is the command of the running system version ()?

Options:

A.

display ap all

B.

display ap-run-info id x (x

C.

display ap version id x(x

D.

display ap update all

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Questions 35

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

Options:

A.

display users all

B.

display user-interface console 0

C.

display local-user

D.

display access-user

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Questions 36

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

Options:

A.

Beacon frame

B.

Probe Request frame

C.

Authentication frame

D.

Association Request frame

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Questions 37

Which of the following agreements are IEEE customized 802.11 standard() ? (Select 3 Answers)

Options:

A.

802.11a/b/g/n

B.

802.11i

C.

802.1X

D.

802.11s

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Questions 38

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

Options:

A.

True

B.

False

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Questions 39

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 40

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

Options:

A.

48

B.

52

C.

54

D.

56

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Questions 41

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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Questions 42

if AP Work in infrastructure mode, then AP The working state at this time is full-duplex mode.

Options:

A.

True

B.

False

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Questions 43

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.

Options:

A.

True

B.

False

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Questions 44

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 45

After wireless users connect to the wireless signal point, they can’t get it IP Address, what are the possible reasons ()? (Select 2 Answers)

Options:

A.

Where the user is VLAN No configuration DHCP server

B.

wlan-ess No configuration on the virtual interface dhcp-enable

C.

The authentication password specified by the user is incorrect

D.

User equipment MAC The address has been added to the blacklist

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Questions 46

AC What is the function in the wireless network()? (Select 3 Answers)

Options:

A.

Centralized management AP

B.

Realize roaming function

C.

Send beacon frame

D.

Wireless intrusion detection

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Questions 47

802.11a What kind of technology is used to implement the agreement?

Options:

A.

FHSS

B.

DSSS

C.

OFDM

D.

MIMO

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Questions 48

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 49

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

Options:

A.

radar

B.

Bluetooth

C.

Infrared

D.

Digital satellite

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Questions 50

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( ).

Options:

A.

1 ,6,11

B.

2 ,7,12

C.

6 ,11,1

D.

11 ,6,1

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Questions 51

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

Options:

A.

RTS

B.

CTS

C.

ACK

D.

PS-Poll

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Questions 52

Which of the following standards organizations implements WLAN technical interoperability for WLAN equipment certification ()?

Options:

A.

WiFi

B.

IEEE

C.

IETF

D.

FCC

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Questions 53

The following description about dual-link backup networking is incorrect ()

Options:

A.

Dual-link backup technology improves network reliability at important network nodes and ensures business stability

B.

Prepare AC Always be in the power-on state

C.

exist AP With active and standby AC In the process of establishing active and standby links, the link established first must be the active link

D.

Active and standby AC The network service configuration on the Internet must be consistent

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Questions 54

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 55

WDS Technology improves the flexibility and convenience of the entire network structure, but it can only support point-to-point working mode.

Options:

A.

True

B.

False

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Questions 56

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 57

eSight The network management is Huawei's dedicated network management platform, but it can only manage Huawei's own equipment.

Options:

A.

True

B.

False

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Questions 58

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

(Select 3 Answers)

Options:

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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Questions 59

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

AP

Options:

A.

SSID

B.

ESSID

C.

BSSID

D.

BSA

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Questions 60

when AC When it is a bypass networking, if the data is forwarded directly, then the data flow () flow () AC. AC; If the data is in tunnel forwarding mode, the data

Options:

A.

Don't go through

B.

Don't pass, don't pass

C.

Pass by

D.

Pass, not pass

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Questions 61

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

Options:

A.

Gypsum board

B.

Glass window (colorless)

C.

Concrete wall

D.

Brick wall

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Questions 62

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

Options:

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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Questions 63

single AP What is the area covered ()?

Options:

A.

BSA

B.

ESA

C.

SSA

D.

TSA

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Questions 64

According to the following output, the correct statement below is ().

display version

Huawei Versatile Routing Platform Software

VRP (R) software, Version 5.70 (AC6605 V200R001C00)

Copyright (C) 2003-2012 Huawei TECH CO., LTD

Quidway AC6605-PWR Routing Switch uptime is 0 week, 1 day, 23 hours, 33 minutes

H852V26S 0(Master): uptime is 0 week, 1 day, 23 hours, 33 minutes

512M bytes DDR Memory

128M bytes FLASH

Check the running status of the AC6605.

(Select 3 Answers)

Options:

A.

display version, you can see that the VRP version number of the current device is 5.70

B.

At present, the equipment has been running continuously for 1 day, 23 hours, 33 minutes

C.

At present, the device has used 512M bytes of system memory

D.

The total size of the flash memory of the device is 128M bytes

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Questions 65

for CAPWAP Agreement, the error described below is ().

Options:

A.

AC And thin AP Transfer protocol

B.

thin AP Transmission protocol with wireless client

C.

Depend on CAPWAP Working group development CAPWAP

D.

The formulation of the agreement has absorbed the useful features of other agreements

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Questions 66

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 67

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

Options:

A.

IEEE 802.3ae

B.

IEEE 802.3af

C.

IEEE 802.3as

D.

IEEE 802.3at

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Questions 68

WEP The encrypted data algorithm uses () algorithm.

Options:

A.

RC4

B.

AES

C.

CCMP

D.

Asymmetric encryption

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Questions 69

For indoor distributed APs, which of the following descriptions is correct is ().

Options:

A.

AP power up to 800mW

B.

Can be deployed in conjunction with the operator's 3G network

C.

Waterproof and dustproof

D.

AP6310SN supports dual frequency mode

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Questions 70

Huawei Wireless Controller AC6605 Supports user access security management through security templates, and supports WAPI Four security strategies.

Options:

A.

True

B.

False

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Questions 71

The following () service model can provide end-to-end QoS services, but the scalability is not good.

Options:

A.

Best Effort model

B.

IntServ model

C.

FIFO model

D.

DiffServ model

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Questions 72

The gain of the antenna can be explained ().

Options:

A.

Antenna's ability to amplify high-frequency electrical signals

B.

The antenna's ability to collect or emit electromagnetic waves in a certain direction is strong or weak

C.

Ability to amplify electromagnetic waves

D.

The antenna's ability to collect or emit electromagnetic waves in all directions is strong or weak

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Questions 73

Compared with 802.11a/b/g, the technical advantages of 802.11n include which of the following aspects ()?

Options:

A.

The maximum theoretical transmission rate is increased to 600Mbps

B.

Backward compatible with 802.11a/b/g protocol

C.

Support MIMO technology

D.

The other three items are correct

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Questions 74

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 75

The following description of the classification and functions of Huawei APs, the correct statement is ().

(Select 3 Answers)

Options:

A.

AP6010SN and AP6010DN are indoor APs

B.

AP6310SN is an indoor distributed AP

C.

AP6510DN and AP6610DN are both outdoor APs

D.

AP6610DN is a gigabit fiber interface, so it cannot be directly connected to AC6605

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Questions 76

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 77

China in 2.4GHz How many channels does the frequency band support ()?

Options:

A.

11

B.

13

C.

3

D.

5

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Questions 78

for AC6605 , The following command () can be used to view AP Is it online?

Options:

A.

display ap online all

B.

display ap all

C.

display ap-type all

D.

dispay ap-run-info all

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Questions 79

802.11 In the frame, STA Which type of frame () does the association request and authentication request belong to?

Options:

A.

Data Frame

B.

Control frame

C.

Management frame

D.

Data frame, control frame, management frame have this function

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Questions 80

As a guarantee WLAN There will be no interference between the various channels of the network, which of the following frequency bands belong to China5.8GHz Use frequency band()? (Select 2 Answers)

Options:

A.

149

B.

151

C.

153

D.

155

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Questions 81

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

Options:

A.

12

B.

24

C.

48

D.

64

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Questions 82

AP Domain AP The deployment type does not include ().

Options:

A.

Ordinary deployment

B.

Orderly deployment

C.

Discrete deployment

D.

Densely deployed

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Questions 83

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

Options:

A.

802.11a

B.

802.11g

C.

802.11e

D.

802.11s

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Questions 84

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 85

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 86

WLAN The commonly used radio frequency cables in the system are (). (Select 3 Answers)

Options:

A.

RG-8 Jumper

B.

1/2 ”(Inch) Super flexible feeder

C.

1/2 "(Inch) feeder

D.

13/8 "(Inch) feeder

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Questions 87

about 5G The working principle of priority, the following statement is correct ().

Options:

A.

5G Priority characteristics refer to 5G Client sends data first

B.

5G After the priority is turned on, only support 2.4G The network transmission speed of the client will be slower

C.

5G Priority request AP Is dual frequency AP Can work normally

D.

5G Priority requires all clients to support at the same time

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Questions 88

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 89

DSSS The modulation methods used are BPSK and QPSK .

Options:

A.

True

B.

False

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Exam Code: H12-311_V3.0
Exam Name: HCIA-WLAN V3.0
Last Update: Jul 14, 2024
Questions: 297
$64  $159.99
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