Which of the following is a telecommunication device that translates data from digital to analog form and back to digital?

The correct answer is B. Modem. A modem (MOdulator/DEModulator) converts digital data from a computer into analog signals for transmission over analog telephone lines (modulation), and converts incoming analog signals back into digital data (demodulation). A multiplexer combines multiple signals onto a single…

Submitted by brentm· Apr 18, 2026Network and Communications Security

Question

Options

AMultiplexer
BModem
CProtocol converter
DConcentrator

How the community answered

(51 responses)

A
4% (2)
B
90% (46)
C
2% (1)
D
4% (2)

Explanation

A modem (MOdulator/DEModulator) converts digital data from a computer into analog signals for transmission over analog telephone lines (modulation), and converts incoming analog signals back into digital data (demodulation). A multiplexer combines multiple signals onto a single transmission medium. A protocol converter translates between different communication protocols. A concentrator aggregates multiple low-speed lines into a single high-speed line. Only the modem performs the digital-to-analog-to-digital conversion.

Topics

#Modem#Telecommunications#Digital-to-Analog Conversion#Analog-to-Digital Conversion

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