Which of the following is not a transmission medium?

Q. Which of the following is not a transmission medium?

A

Coaxial Cable

B

Telephone Lines

C

Modem

D

Microwave System

Solution:

A modem is a device or program that enables a computer to transmit data over, for example, telephone or cable lines.
Computer information is stored digitally, whereas information transmitted over telephone lines is transmitted in the form of analog waves.
A modem converts between these two forms.

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