search engine optimization Modem means modulator and demodulator. It is a gadget that you use to transmit date and to receive data as well via a channel for communication. These channels can be a cable, telephone line and an optic fiber. 1. The first answer to the question, why is a modem needed is because we need a converter so data can be transferred to the analog system of the telephone. Today we can also change data that is digital to analog mode. The signal is then changed into digital by the modem through demodulation. This is the simple explanation
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