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

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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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