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Huawei H12-311_V3.0 Practice Test - Questions Answers, Page 3
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Question 21
Which of the following protocols support 2.4GHz Frequency band()? (Select 3 Answers)
802.11a
802.11b
802.11g
802.11n
Question 22
China in 2.4GHz How many channels does the frequency band support ()?
11
13
3
5
Question 23
Which of the following options is the frequency range supported by China 5GHz Frequency band()?
5.15~5.25GHz
5.25~5.35GHz
5.725~5.825GHz
5.725~5.850GHz
Question 24
According to the different signal parameters controlled, what modulation methods can be divided into ()? (Select 3 Answers)
AM
FM
phase modulation
Wave modulation
Question 25
Which modulation method is the picture below ()?
AM
FM
phase modulation
Wave modulation
Question 26
What was the name of the first radio communication network based on packet technology ()?
INTERNET
ARPANet
ALOHNET
NSFnet
Question 27
WLAN What are the working frequency bands ()? (Select 2 Answers)
2 GHz
5 GHz
5.4 GHz
2.4 GHz
Question 28
2.4 GHz How many channels () can the frequency band be divided into at most?
14
13
11
3
Question 29
2.4 GHz What is the frequency band US non-overlapping channel ()?
2,7,12
3,8,13
1,6,11
3,7,13
Question 30
2.4 GHz What is the distance between the center frequencies of the channels in the frequency band ()?
20 MHz
22 MHz
5 MHz
10 MHz
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