Question

Name the device used to connect computers for communication via telephone lines.

A. HUB

B. Switch

C. Repeater

D. MODEM
1. D
2. A
3. C
4. B
5. None of these

Answer 1

Correct Answer - Option 1 : D

Option 1 is correct, i.e. MODEM.

• A modem is a hardware device that allows a computer to send and receive data over a telephone line or a cable or satellite connection.
• MODEM stands for modulator-demodulator.

 

• A modem is used for transmitting and receiving data over a communication channel, such as twisted-pair telephone lines, coaxial cables, and optical fibers.
• At the source, the modulation technique is used to convert the analog signal to digital.
• At the receiver, demodulation is used to convert the digital signal back to analog.