Which of the following technologies works at 5 GHz (Select 2 Answers)?
A. Radar
B. Bluetooth
C. Infrared
D. Digital Satellite
Which of the following protocols can support both the 2.4 GHz band and the 5 GHz band?
A. 802.11a
B. 802.11b
C. 802.11g
D. 802.11n
What is the bandwidth of each channel in the 802.11g band?
A. 25 MHz
B. 20 MHz
C. 50 MHz
D. 22 MHz
What is the US non-overlapping channel in the 2.4 GHz band?
A. 2 , 7, 12
B. 3, 8, 13
C. 1, 6, 11
D. 3, 7, 13
What is the distance between the center frequencies of the channels in the 2.4 GHz band?
A. 20 MHz
B. 22 MHz
C. 5 MHz
D. 10 MHz
What are the WLAN operating bands (Select 2 Answers)?
A. 2 GHz
B. 5 GHz
C. 5.4 GHz
D. 2.4 GHz
How many channels can the 2.4 GHz band be divided into?
A. 14
B. 13
C. 11
D. 3
What is the name of the first radio communication network based on packet technology?
A. INTERNET
B. ARPANet
C. ALOHNET
D. NSFnet
Which modulation method does the following picture belong to?
A. amplitude modulation
B. frequency modulation
C. phase modulation
D. modulation
Which of the following options is in the 5GHz band supported by China?
A. 5.15~5.25GHz
B. 5.25~5.35GHz
C. 5.725~5.825GHz
D. 5.725~5.850GHz
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