Which of the following is used for modulation and demodulation?

A. modem

B. protocols

C. gateway

D. multiplexer

E. None of the above

Answer: Option A

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Related Questions on Networking Miscellaneous

The difference between a multiplexer and a statistical multiplexer is

A. Statistical multiplexers need buffers while multiplexers do not need buffers

B. Multiplexer use X.25 protocol, while statistical multiplexers use the Aloha protocol

C. Multiplexers often waste the output link capacity while statistical multiplexers optimize its use

D. Multiplexers use Time Division Multiplexing (TDM) while statistical multiplexers use Frequency Division Multiplexing (FDM)

E. None of the above

Which of the following statements is incorrect?

A. The difference between synchronous and asynchronous transmission is the clocking derived from the data in synchronous transmission

B. Half-duplex line is a communication line in which data can move in two directions, but not at the same time.

C. Teleprocessing combines telecommunications and DP techniques in online activities.

D. Batch processing is the preferred processing mode for telecommunication operations

E. None of the above