what is the use of a modem ?
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A modem modulates and demodulates electrical signals sent through phone lines, coaxial cables, or other types of wiring; in other words, it transforms digital information from your computer into analog signals that can transmit over wires, and it can translate incoming analog signals back into digital data that your computer can understand. Most stand-alone modems have just two ports: one that connects to the outside world, and an Ethernet jack that connects to a computer or a router.
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Modem stands for modulator-demodulator. It is a hardware device that allows a computer to receive and send data over the telephone line.
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