Question

Which of the following is not a transmission medium?
A.telephone lines
B.coaxial cable
C.modem
D.microwave systems

Answer 1

correct answer is option:- C
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Answer 2

A modem is not a transmission medium out of the given options.

• There are two forms of media of transmission, that is directed and unguided. Cables such as twisted pair cables, coaxial cables, and fiber optic cables are guided transmission devices. Unguided transmission devices, include the radar, radio waves, and microwaves, that are also wireless.
• In the given options, all are channels of communication but modem is a tool that transforms analog signals into digital signals or vice-versa. A modem is a software allowing a computer, to transmit data over the telephone or cable lines. Computer information is digitally processed, while information is distributed over telephone lines in the form of analog waves. Between these two types, a modem transforms