When a digital signal needs to be transmitted over an analog medium, such as when a computer needs to send digital signals over an analog telephone line or TV cable, a device known as a(n) ____ is used.
A) modem
B) translator
C) amplifier
D) phaser

Question

Quizplus · Accepted Answer

A modem (short for modulator-demodulator) modulates the digital signal into an analog signal that can pass through the analog medium, and then demodulates the received analog signal back into a digital signal that can be processed by the receiving device.

When a Digital Signal Needs to Be Transmitted Over an Analog