What is analog and digital data transmission?
Analog transmission is a transmission method of conveying information using a continuous signal which varies in amplitude, phase, or some other property in proportion to that information. And, Digital transmission is the sending of information over physical communication media in the form of digital signals.
While analog transmission is the transfer of a continuously varying analog signal over an analog channel, digital communications is the transfer of discrete messages over a digital or an analog channel. ... Data transmitted may be digital messages originating from a data source, for example a computer or a keyboard.