What is modulation and demodulation in computer networking ?
The answer to ‘What is modulation and demodulation’ in computer networking, can be more easily explained by considering, what the well known computer modem does. A computer with a network connection, eg. internet connection, that connects over a phone line or radio link requires a modem. In a modem, the MODULATION process involves the conversion of the digital computer signals (high/low, on/off or logic 1 and 0 states) to audio-frequency tones. Digital highs are converted to a tone having a certain frequency or pitch; digital lows are converted to a tone having a different frequency or pitch. The DEMODULATION process converts the audio tones back into digital signals that a computer can understand directly.
