Modem:
1. Modem stands for modulation - demodulation.
2. Modem is a input as well as output device.
3. Modem is used to convert digital signal into analog signal and also used to convert analog signal into digital signal.
4. Modulation is the process to convert digital signal into analog signal.
5. Demodulation is the process to convert analog signal into digital signal.
Types of Modulation:
1. AM
2. PM
3. FM
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