GB0-342-ENU試験無料問題集「H3CSE-WLAN 認定」

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トータル 340 問

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出題：1

Which of the following statements about indoor AP installation specifications is correct is ______

A. When the AP is installed in a weak current well, safety measures such as dust-proof, waterproof and porcelain-proof should be taken, and good ventilation should be maintained, and the working environment should be clean; when the AP is installed on the wall of the building, anti-theft measures must be taken Measures: When the AP is installed on the ceiling, it must be fixed with a fixing bracket, and it is not allowed to hang it in the air or throw it directly on the ceiling. It should be repaired.

B. The AP must be firmly fixed during installation, and it is not allowed to be placed in the air; the installation location of the AP must have enough space to facilitate equipment heat dissipation, debugging and maintenance.

C. The AP installation location must meet the engineering design requirements. If the AP installation location needs to be changed, the consent of the design unit and the construction unit must be obtained, and the design change procedures must be handled.

D. The wells, floors, walls, etc. of the installation location shall not seep water, the dust shall be small, and the ventilation shall be good. The installation location must ensure that there is no strong electricity, strong magnetism and corrosive equipment. The temperature and humidity of the installation location shall not exceed the host. Good lighting conditions for easy maintenance of equipment

正解：A,B,C,D 解答を投票する

出題：2

Which of the following statements about outdoor AP installation specifications is correct?

A. The outdoor construction site should be easy to fix the device without obstruction; the building wall involved in the outdoor hardware installation should be firm and complete.

B. The AP installation location must meet the engineering design requirements. If the AP installation location needs to be changed, the approval of the design unit and the construction unit must be obtained, and the change procedures must be handled.

C. Lightning protection and waterproofing must be done for outdoor equipment installation: Additional lightning protection devices are required for outdoor construction, such as lightning rods, ground stakes, grounding bars, etc. The AP surface should be perpendicular to the horizontal plane, and the outlet holes for wiring should be waterproofed Strict waterproof sealing measures should be taken at each joint.

D. If the AP is placed in a waterproof box, the box must be firmly fixed and kept vertical: the box should be ventilated to facilitate the heat dissipation of the equipment: the box can be installed on the inner façade of the roof wall to block light In order to keep out the rain, all cables entering the waterproof box need to be waterproofed or routed downwards; the waterproof box can also be fixed on the pole used to install the antenna with a hoop.

正解：A,B,C,D 解答を投票する

出題：3

In the 802.11a/g protocol, the OFDM transmission technology defines

A. 52, 36

B. 50, 48

C. 52, 48

D. 48, 36

正解：C 解答を投票する

出題：4

In the implementation of WLAN and the operator's indoor distribution network, the commonly used RF cables describe the WLAN signal loss correctly (AC)

A. 7/8 feeder 100m loss 6.95dB

B. 1/2 standard feeder 100m loss 6.95dB

C. 1/2 super flexible feeder 100m loss 19.2dB

D. All of the above are correct

正解：A,C 解答を投票する

出題：5

The RSSI requirement of the wireless terminal return signal in the medical industry is greater than:

A. 30

B. 20

C. 15

D. 25

正解：A 解答を投票する

出題：6

The theoretical maximum transmission rate of WLAN usually refers to the transmission rate of large-byte (1500 bytes) packets, but in most networks, there are many small-byte (below 250 bytes) packets, which will seriously affect the practical application of WLAN. performance, making it well below the theoretical maximum rate. The above statement is true.

A. error

B. correct

正解：B 解答を投票する

出題：7

The Wi-Fi Alliance is a non-profit international association established in 1999 to certify the interoperability of wireless LAN products based on the IEEE 802.11 specification and to promote the formulation of new wireless standards. Interoperability (eg wireless connectivity, encryption, roaming, etc.).
Which of the following are protocol standards proposed by the Wi-Fi Alliance?

A. CAPWAP

B. 802.11e

C. 802.11i

D. IACTP

正解：B,C 解答を投票する

出題：8

About the CAPWAP protocol AP registration to AC interaction process description is correct ()

A. ImageData-Configure-Discovery-Join

B. ImageData-DiscoveryJoin-Configure

C. Discovery-ImageDataJoin-Configure

D. Discovery-Join-ImageData-Configure

正解：D 解答を投票する

出題：9

When W2220XAGP works under 11a for bridging, by default, it can establish bridging with _____ peer devices at most, and the RSSI of peer device signal strength should be at least greater than _____ bridging to ensure stable operation.

A. 2; 30

B. 2; 15

C. 4; 30

D. 4; 15

正解：A 解答を投票する

出題：10

Which of the following technologies are the key technologies and improvements introduced by 802.11ac

A. Supports both 2.4G and 5G

B. 256-QAM modulation

C. MU-MIMO technology

D. 80MHz and 160MHz channel bonding

正解：A,B,C,D 解答を投票する

出題：11

When the SSID encryption type configured in the AP is WEP encryption (password is 12345), the MAC layer authentication method is shared-key, and the password entered by the client is 54321, which of the following phenomena will occur?

A. The client can successfully connect to the AP and communicate normally, but the data message is transmitted in plaintext

B. The client could not successfully connect to the AP

C. The client can successfully connect to the AP, but cannot communicate normally

D. The client will prompt that the password is incorrect and ask to re-enter it

正解：B 解答を投票する

出題：12

When increasing the gain of an omnidirectional antenna, which of the following statements is true about the coverage of the antenna

A. The coverage angle in the horizontal direction of the antenna increases, and the coverage distance remains unchanged

B. The coverage angle in the horizontal direction of the antenna is unchanged, and the coverage distance is unchanged

C. The coverage angle in the horizontal direction of the antenna remains unchanged, and the coverage distance becomes farther.

D. The coverage angle in the horizontal direction of the antenna increases, and the coverage distance becomes farther.

正解：A 解答を投票する

出題：13

(Single Choice) The following technologies are not specific to the 802.11ax protocol.

A. 802.11ax introduces BSS-COLOR to quickly identify BSS and improve signal reception and demodulation efficiency.

B. 802.11ax supports both uplink and downlink MU-MIMO.

C. 802.11ax modulation mode supports 1024QAM.

D. Supports 8-channel bonding with 160MHz bandwidth.

正解：D 解答を投票する

出題：14

Which of the following statements about the use of the debugging command is correct?

A. Use some specific debugging commands only when looking for certain types of traffic or failures and narrowing down the cause of the failure to a possible range, which on the one hand can reduce the impact of debugging commands on device performance, and on the other hand On the one hand, it reduces the output of a lot of useless information, which is conducive to more rapid fault location

B. Do not use the debugging command lightly without fully grasping the working process of the debugging command and the information it provides

C. Try to use it when the network usage is low or when there are few network users to reduce the impact of debugging commands on the system

D. The debugging command should be used to find faults, not to monitor normal network operation

E. Since the debug command occupies different system resources in each output direction, depending on the network load, we should use the convenience ( info-center console debugging command) and low resource consumption ( info-center log buffer debugging command) ) to balance

正解：A,B,C,D,E 解答を投票する

出題：15

H3C wireless controller supports both local authentication and Radius for MAC authentication. The user name and password are both: (Advanced test)

A. WX5002

B. Client MAC

C. 111

D. H3C

正解：B 解答を投票する

出題：16

In the planning of the wireless network, it is generally recommended to increase the equipment allowance of ______ on the basis of the number of APs based on the site survey and statistics.

A. 20% or more

B. 10%-20%

C. 5% or less

D. 5%-10%

正解：D 解答を投票する

出題：17

(Multiple choice) The following wireless controller models that only support the local forwarding mode are.

A. WX3010H-L

B. WX5560H

C. LSQM1WCMX40

D. WX3024H-L

正解：A,D 解答を投票する

出題：18

The correct statement about the four address bits of the 802.11 frame format is:

A. Address 1 of the 802.11 data frame is the MAC address of the sender

B. Address 2 of the 802.11 data frame is the MAC address of the receiver

C. Address 3 of 802.11 management frame is BSSID

D. 802.11 control frames may have only one address bit

正解：A,B,C,D 解答を投票する

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トータル 340 問

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