What type of device modulates (changes) an analog carrier signal into digital information for transmission over a medium?

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Multiple Choice

What type of device modulates (changes) an analog carrier signal into digital information for transmission over a medium?

Explanation:
Modulation is the process of encoding digital information into an analog carrier so it can be transmitted over a physical medium. A modem is the device that performs this function, converting digital bits into an analog signal for transmission and typically demodulating the received analog signal back into digital data. Routers and switches handle forwarding of data packets or frames, not encoding for transmission over a medium, and amplifiers boost signal power without changing the data encoding. Therefore, the modem is the device described.

Modulation is the process of encoding digital information into an analog carrier so it can be transmitted over a physical medium. A modem is the device that performs this function, converting digital bits into an analog signal for transmission and typically demodulating the received analog signal back into digital data. Routers and switches handle forwarding of data packets or frames, not encoding for transmission over a medium, and amplifiers boost signal power without changing the data encoding. Therefore, the modem is the device described.

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