Data transmission / Data transfer Data transfer is the process by which data or information from one source travels to a destination via a medium. Data transfer can either be a point to point or multipoint. The channel is the medium used in transfer including copper wires, optical fibers, wireless communication channels, modems, etc. Data is usually represented as an electromagnetic signal, usually an electrical voltage, radio wave, microwave or infrared signals. The rate of data transfer defines the speed at which one unit of data is transferred per...