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Question # 4

CAPWAP The port number of the control message of the tunnel protocol is ().

A.

1645

B.

1646

C.

5246

D.

5247

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Question # 5

AP The size of the coverage area is controlled by ().

(Select 2 Answers)

A.

adjust AP Antenna angle

B.

adjust AP Transmit power

C.

adjust AP Power supply

D.

adjust AP Access bandwidth

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Question # 6

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

A.

48

B.

52

C.

54

D.

56

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Question # 7

Which of the following statements about Layer 2 and Layer 3 roaming are true?

A.

Layer 3 roaming indicates that STAs roam between different subnets.

B.

Layer 2 roaming indicates that STAs roam within the same subnet.

C.

Layer 2 roaming can be determined as long as the VLAN IDs before and after roaming are the same.

D.

After Layer 3 roaming is performed, the VLAN IDs in the service sets of APs must be the same.

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Question # 8

Which is the longest interval between 802.11 frames ()?

A.

SIFS

B.

IFS

C.

DIFS

D.

PIFS

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Question # 9

After deploying a WLAN, an engineer finds that the corresponding SSIDs cannot be discovered and suspects that some APs failed to go online. To query the APs that have gone online on the AC, the engineer can run the ___ command.

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Question # 10

When coverage area 2.4GHz Frequency band 1 When channel interference is large and severe, adjust the device to 3 Channel, can effectively reduce interference.

A.

True

B.

False

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Question # 11

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

A.

48

B.

52

C.

54

D.

56

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Question # 12

original 802.11 What is the working frequency band used by the agreement ()?

A.

2.4 GHz

B.

900 MHz

C.

2.0 GHz

D.

5 GHz

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Question # 13

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

A.

True

B.

False

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Question # 14

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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Question # 15

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 # 16

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

A.

SIFS

B.

IFS

C.

DIFS

D.

PIFS

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Question # 17

ETSI Which country or region is the standards organization ()?

A.

China

B.

America

C.

Japan

D.

Europe

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Question # 18

display ap all Command can be viewed AP of MAC ,Type And running status.

A.

True

B.

False

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Question # 19

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

A.

display ap online all

B.

display ap all

C.

display ap-type all

D.

dispay ap-run-info all

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Question # 20

Originally only supported TKIP The wireless network card can be upgraded through the driver to support AES encryption.

A.

True

B.

False

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Question # 21

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

A.

True

B.

False

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Question # 22

Drag the networking modes on the left to their corresponding characteristics on the right.

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Question # 23

Which of the following statements about WLAN roaming are false?

A.

APs with which a STA is associated before and after roaming can work on different channels.

B.

During roaming, the STA sends an Association Request frame containing home AP information to the foreign AP.

C.

APs with which a STA is associated before and after roaming must work on the same channel.

D.

During roaming, the STA sends a Reassociation Request frame containing home AP information to the foreign AP.

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Question # 24

In enterprise office scenarios, 40 MHz channel bandwidth is usually configured on the 2.4 GHz frequency band.

A.

True

B.

False

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Question # 25

Which of the following protocols support 2.4GHz Frequency band()? (Select 3 Answers)

A.

802.11a

B.

802.11b

C.

802.11g

D.

802.11n

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Question # 26

For outdoor WLAN Cover, the following statement is correct ().

(Select 3 Answers)

A.

The higher the antenna gain, the stronger the antenna directivity, and the weaker the radiation gain directly below the antenna

B.

The feeder interface must match the selected antenna

C.

The length of the feeder must not exceed 2 rice

D.

Outdoor antennas should not blindly pursue high gain

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Question # 27

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

(Select 3 Answers)

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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Question # 28

CAPWAP Which of the following standards organization proposed the agreement ()?

A.

FCC

B.

IETF

C.

CCC

D.

ETSI

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Question # 29

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

A.

Best Effort model

B.

IntServ model

C.

FIFO model

D.

DiffServ model

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Question # 30

The following about SSID The statement is wrong ().

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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Question # 31

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.

A.

True

B.

False

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Question # 32

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

A.

Beacon frame

B.

Probe Request frame

C.

Authentication frame

D.

Association Request frame

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Question # 33

If one BSS Totally by STA Composition, then BSS What is also called ()?

A.

IBSS

B.

ESS

C.

SSID

D.

BSA

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Question # 34

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)

A.

149

B.

151

C.

153

D.

155

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Question # 35

Which of the following types of frames does a STA receive to obtain surrounding wireless network information during passive scanning?

A.

Authentication frame

B.

Association Request frame

C.

Beacon frame

D.

Probe Request frame

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Question # 36

AP There are several types of domain deployment (). (Select 3 Answers)

A.

Independent deployment

B.

Discrete deployment

C.

Ordinary deployment

D.

Densely deployed

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Question # 37

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 # 38

Which of the following modes can be used to upgrade Huawei APs?

A.

FTP mode

B.

SFTP mode

C.

AC mode

D.

SSH mode

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Question # 39

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 # 40

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

A.

WiFi

B.

IEEE

C.

IETF

D.

FCC

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Question # 41

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

A.

1

B.

2

C.

5.5

D.

11

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Question # 42

In the following command (), you can view the current version information.

A.

display interface

B.

display current-configuration

C.

display ap all

D.

display version

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Question # 43

Which of the following statements is true about the coverage distance design principles of a single AP (20 dBm)?

A.

It is recommended that a 5.8 GHz AP be deployed for through-wall signal coverage.

B.

In the same scenario, the coverage distance of a 2.4 GHz AP is smaller than that of a 5.8 GHz AP.

C.

Inter-floor coverage is supported.

D.

In an open area, the coverage distance is designed based on the AP's coverage capability.

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Question # 44

Which of the following commands is not necessarily run in the WLAN view?

A.

ssid-profile name xxx

B.

capwap source interface vlanif 100

C.

ap auth-mode mac-auth

D.

ap-group name xxx

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Question # 45

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 # 46

If there is a high demand for WLAN capacity in a coverage area, the construction method of () should be considered.

A.

Combination of indoor distribution system

B.

Combination of outdoor distribution system

C.

Indoor installation

D.

Outdoor AP+ directional antenna

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Question # 47

If it is turned on on the switch PoE The function of this, you can no longer access traditional equipment on these interfaces.

A.

True

B.

False

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Question # 48

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 # 49

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

A.

802.11a/b/g/n

B.

802.11i

C.

802.1X

D.

802.11s

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Question # 50

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 # 51

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 # 52

WEP The encrypted data algorithm uses () algorithm.

A.

RC4

B.

AES

C.

CCMP

D.

Asymmetric encryption

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Question # 53

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 # 54

How many management nodes () does eSight Standard Edition support at most?

A.

60

B.

2000

C.

5000

D.

20000

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Question # 55

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

A.

True

B.

False

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Question # 56

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 # 57

Among the following obstacles, () has the largest loss of wireless signals.

A.

Plaster ceiling

B.

Glass

C.

120mm brick wall

D.

200mm concrete wall

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Question # 58

When collecting fault information, you need to collect device logs, including ___ logs and ___ logs.

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Question # 59

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 # 60

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 # 61

The equipment manufacturer can usually be judged according to the following ().

A.

SSID

B.

MAC address

C.

Encryption type

D.

channel

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Question # 62

Int-Serv The model provides users with end-to-end absolute

A.

Limited bandwidth reservation

B.

Low forwarding efficiency

C.

Scalability is not good

D.

Not conducive to traffic monitoring

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Question # 63

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

A.

True

B.

False

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Question # 64

802.11b Which channels in the protocol do not overlap each other()? (Select 3 Answers)

A.

1

B.

3

C.

6

D.

11

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Question # 65

exist PoE Terminology PSU Full name is Power Supply Unit , Refers to the power supply unit, such as PoE The Ethernet interface of the switch.

A.

True

B.

False

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Question # 66

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 # 67

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 # 68

If the wireless client wants to pass AP Connected to WLAN , Then what is it through to connect to the wireless network ()?

A.

SSID

B.

IBSS

C.

BSID

D.

BSA

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Question # 69

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 # 70

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

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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Question # 71

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

A.

AC-BE

B.

AC-VI

C.

AC-VO

D.

AC-BK

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Question # 72

The AirEngine 9700D-M is Huawei's next-generation Wi-Fi 6 AC.

A.

True

B.

False

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Question # 73

When did the initial application of wireless networks begin ()?

A.

During the First World War

B.

During the Second World War

C.

20 Late century

D.

2000 Years later

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Question # 74

An engineer takes an AP to a shopping mall for onsite WLAN surveying, with only a simple building map and no known obstacles. During onsite signal attenuation test, the AP works in ___ mode.

A.

Fat AP

B.

Survey Mode

C.

Fit AP

D.

Monitor Mode

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Question # 75

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 # 76

Which of the following types of frames does a STA send to obtain surrounding wireless network information during active scanning?

A.

Association Request frame

B.

Beacon frame

C.

Authentication Request frame

D.

Probe Request frame

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Question # 77

dBm is a unit for measuring signal strength, and this can be converted into a value in mW. Which of the following unit conversions are true?

A.

3 dBm = 2 mW

B.

10 dBm = 20 mW

C.

0 dBm = 1 mW

D.

3 dBm = 3 mW

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Question # 78

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

A.

True

B.

False

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Question # 79

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

A.

Independent power adapter

B.

POE switch

C.

POE adapter

D.

AC power supply

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Question # 80

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 # 81

Which modulation method is the picture below ()?

A.

AM

B.

FM

C.

phase modulation

D.

Wave modulation

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Question # 82

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

A.

IEEE 802.11

B.

IEEE 802.10

C.

IEEE 802.12

D.

IEEE 802.16

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Question # 83

The following pairs PSK The authentication description is wrong ().

A.

PSK Authentication requires the same pre-shared key to be configured on the wireless client and device

B.

WPA and WPA2 All support PSK Certification

C.

PSK The authentication process is similar to the shared key authentication process, so the security is the same

D.

PSK Certification is passed 4 Handshake Key Negotiate to verify STA side Key The legitimacy

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Question # 84

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

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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Question # 85

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

A.

AIFSN

B.

SIFS

C.

DIFS

D.

TXOPLimit

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Question # 86

single AP What is the area covered ()?

A.

BSA

B.

ESA

C.

SSA

D.

TSA

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Question # 87

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

A.

3

B.

4

C.

5

D.

6

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Question # 88

802.11 What parameters are used in the frame to reorganize the frame segment ()?

A.

Frame Control

B.

Duration

C.

Address Bit

D.

Fragment number

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Question # 89

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 # 90

The following figure shows the hardware structure of an AirEngine 5760-51. Which of the following statements is true?

A.

1: Reset button

B.

3: USB port

C.

2: Port that receives PoE power

D.

8: IoT slots

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Question # 91

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 # 92

Which of the following are the relevant parameters of the Traffic template ().

(Select 2 Answers)

A.

802.3 priority mapping strategy

B.

CAC strategy

C.

Tunnel priority mapping strategy

D.

ACK strategy

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Question # 93

There are three ways to judge Huawei's load balancing: traffic mode, session mode, and virtual switching mode.

A.

True

B.

False

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Question # 94

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

display device

AC6605-26-PWR's Device status:

Slot Sub Type Online Power Register Status Role

-----------------------------------

0-AC6605-26 Present PowerOn Registered Normal Master

POWER Present PowerOn Registered Normal NA

(Select 2 Answers)

A.

The user is currently operating on the wired side of the AC

B.

The user is currently operating on the wireless side of the AC

C.

According to the output, it can be concluded that the AC6605 uses a POE power supply module

D.

To implement the related configuration of WLAN, the user must first switch to the wireless side by CTRL+Ypass

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Question # 95

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.

A.

True

B.

False

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Question # 96

SSID What is the Chinese name of ()?

A.

Basic service set

B.

Basic service area

C.

Extended service set

D.

Service set ID

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Question # 97

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

A.

True

B.

False

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Question # 98

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 # 99

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.

A.

True

B.

False

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Question # 100

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 # 101

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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