A device that modulates digital data onto an analog signal and then demodulates the analog signal back to digital data is a ____.
A) repeater
B) switch
C) hub
D) modem

Question

Quizplus · Accepted Answer

A modem (modulator-demodulator) is a device that converts digital signals from computers or other digital devices to analog signals that can be transmitted over telephone lines or other analog transmission systems. The modem on the receiving end then demodulates the signal back to digital data for use by the receiving device.

A Device That Modulates Digital Data onto an Analog Signal