Which of the following is a telecommunication device that translates data from digital to analog form and back to digital?
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A. B. C. D.B.
A modem is a device that translates data from digital form and then back to digital for communication over analog lines.
The telecommunication device that translates data from digital to analog form and back to digital is a modem.
A modem is a device that modulates (converts) digital data into analog signals for transmission over a communication channel (such as a telephone line or cable) and demodulates (converts) received analog signals back into digital data.
The modem receives digital data from a computer or other digital device and converts it into analog signals that can be transmitted over a communication channel. When the analog signals are received at the other end, the modem converts them back into digital data that can be understood by the receiving device.
Multiplexers, concentrators, and protocol converters are other types of telecommunication devices but do not perform the same function as a modem.
A multiplexer combines multiple digital signals into a single signal for transmission over a communication channel, while a concentrator aggregates multiple low-speed channels into a higher-speed channel.
A protocol converter translates data between different communication protocols (e.g., between TCP/IP and SNA), but does not perform digital-to-analog and analog-to-digital conversion.