题目内容

A__________________is a transmission medium that carries a signal between the transmitter and the receiver.

A. communication channel
B. telephone line
C. coaxial cable
D. multiplexing

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______is a form of signal transmission in which one communication channel carries several transmission at the same time.

A. Braodcaster
B. Microwave
C. Multiplexing
D. Coaxial cable

The method of dividing the medium into communication channel is called ______.

A. EMI
B. TDM
C. FDM
D. PCM

Transmission media are classified as wired and _________.

A. the telephone line
B. the twisted pair cable
C. the optical fibre
D. wireless

______has a inner conductor surrounded by a non-conductive dielectric insulating material.

A coaxial cable
B. A twisted pair cable
C. An optical fibre
D. A multiplexing