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WAN MCQs - Wide Area Networks Objective Type Questions & Answers

Questions
1 Which device in communication satellite listens to some portion of a spectrum, amplifies the incoming signal, and then rebroadcasts it at another frequency ?
A Transponder
B Repeater
C Gateway
D None of these

Answer: Option [A]
2 Which device is used at a receiving end of an optical fiber ?
A Led
B Interferometer
C Photodiode
D None of these

Answer: Option [C]
3 In optical fiber, light does not propagate best in ‘window’ centered at
A 850 nm
B 1300 nm
C 1500 nm
D None of these

Answer: Option [C]
4 Which of the following protocols cannot be used on satellite-based wide area networks ?
A CDMA
B Polling
C FDM
D None of these

Answer: Option [D]

Satellite based wide area networks use five classes of protocols polling, ALOHA, FDM, TDM, and CDMA.

5 How many 64-kbps digital voice channels can be encoded by a 50-Mbps transponder in satellite communication ?
A 320
B 640
C 800
D None of these

Answer: Option [C]

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