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H12-311 : HCIA-WLAN (Huawei Certified ICT Associate-WLAN) Exam

Huawei H12-311 Questions & Answers

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H12-311


HCIA-WLAN (Huawei Certified ICT Associate-WLAN)


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Question: 140


How many channels can be most divided into by 4 GHz frequency band()?

  1. 14

  2. 13

  3. 11

  4. 3


Answer: A


Question: 141


In 20m Mode, how many subcarriers of 802.11a can be used to transfer data()?

  1. 48

  2. 52

  3. 54

  4. 56


Answer: A


Question: 142


Which protocol can support both 2.4 GHz frequency band and 5 GHz frequency band()? A. 802.11a

B. 802.11b C. 802.11g D. 802.11n


Answer: D


Question: 143


Radio frequency mainly use spread spectrum technology, which of the following technology is belong to spread spectrum technology?


(Select 2 Answers)

  1. FHSS

  2. DSSS

  3. QPSK

  4. OFDM

Answer: A B


Question: 144


In the frame of 802.11, when Network employs WDS Model to improve the signal, what are the values of To DS and From Ds()?

  1. 0,0

  2. 0,1

  3. 1,0

  4. 1,1


Answer: A


Question: 145


What kind of technology belongs to Wireless MAN in the folllowing()?

  1. 2G/3G

  2. WLAN

  3. Bluetooth

  4. WiMAX


Answer: B


Question: 146


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

  1. 11

  2. 13

  3. 3

  4. 5


Answer: B


Question: 147


WDS technique improves the flexibility and convenience of the whole network structure, but can only support the working mode of point to point 。

  1. True

  2. False


Answer: B


Question: 148


How much bandwidth each 802.11 g frequency band channel()?

  1. 25 MHz

  2. 20 MHz

  3. 50 MHz

  4. 22 MHz


Answer: B


Question: 149


Because the maximum support rate of 802.11a is the same as 802.11g, so the protocol of 802.11a is backwards compatible with 802.11g protocol.

  1. True

  2. False


Answer: B


Question: 150


In the following options which frequency band range belong to China supported 5 GHZ frequency band()? A. 5.15~5.25GHz

B. 5.25~5.35GHz C. 5.725~5.825GHz D. 5.725~5.850GHz


Answer: D


Question: 151


If AP Client which connect the same SSID want to surf from one AP to another AP, so the overlapping area between two AP signal()?

  1. 50%

  2. Don’t need to overlap C. 100%

D. 10%-15%


Answer: D


Question: 152


In WLAN, AP has been working in half duplex 。

  1. True

  2. False


Answer: A

Question: 153


One company want to deploy WLAN, and this company purchase a batch of wireless AP that support 802.11n , when WLAN deployed, can only support 802.11n wireless client can connect to the WLAN.

  1. True

  2. False


Answer: B


Question: 154

What are the WALN standard which the the transmission rate can reach more than 54 MBPS()? (Select 3 Answers)

A. 802.11a

B. 802.11b C. 802.11g D. 802.11n


Answer: A C D


Question: 155


There are three frame types of 802.11 ,respectively() 。


(Select 3 Answers)

  1. Data Frame

  2. Control Frame

  3. Business Frame

  4. management frames


Answer: A B D


Question: 156


In the WLAN, ACK frame belongs to what type of frame()?

  1. management frames

  2. Control Frame

  3. Data Frame

  4. empty data frame


Answer: B


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