220-801 · Question #101
Which of the following devices is used to convert initially audible signals into digital signals to provide communication between two endpoints?
The correct answer is D. Modem. A modem (modulator-demodulator) converts analog signals (such as those transmitted over traditional telephone lines) into digital signals that a computer can process, and vice versa. This conversion is necessary because the public switched telephone network (PSTN) was…
Question
Which of the following devices is used to convert initially audible signals into digital signals to provide communication between two endpoints?
Options
- ABridge
- BFax machine
- CRepeater
- DModem
How the community answered
(36 responses)- A3% (1)
- B3% (1)
- D94% (34)
Explanation
A modem (modulator-demodulator) converts analog signals (such as those transmitted over traditional telephone lines) into digital signals that a computer can process, and vice versa. This conversion is necessary because the public switched telephone network (PSTN) was originally designed for analog voice transmission, while computers communicate digitally. A bridge connects network segments, a repeater amplifies signals without converting them, and a fax machine transmits documents but is not primarily a signal conversion device for general data communication.
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