= Modem is used to establish an Internet connection using a standard telephone line. It is an electronic device used to convert digital signal into analog and vice versa. Basically, a modem is used for transmitting and receiving data over a communication channel, such as twisted-pair telephone lines, coaxial cables, and optical fibers.
Modem has two parts – (a) Modulator and
(b) Demodulator.
a) Modulator: It converts digital signal into analog.
b) Demodulator: It converts analog signal onto digital.
It is also I/O device because it convert input signal into digital and output signal into analog. There are two types of modem in used, (a) Internal modem and
(b) External modem.
This is a useful reference for students learning computer networking basics. The explanation of the modem's two main components, modulator and demodulator, is concise and accurate. It would be even better with updated examples of broadband connections, including those delivered through a fibre phone line service.
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