A receiver is used by the message destination to recover data from the transmission media. A transmitter is used by the message source to place data onto a transmission media. In computer networks, the media is usually a type of cable, or a wireless transmission. The bits are then encoded into a signal that can be transmitted over the appropriate medium. These can be sent across a data or information network by first converting them into binary digits, or bits.
Consider, for example, communicating a message using words, pictures and sounds.
