Components of a Data Communication System

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Protocol- set of rules that governs data Communication. Without protocol it may connected but not communicate.

Receiver - device that receives the message. E.g.: Computer, Workstation, Telephone handset, TV, and so on.

Message – information(data) To be communicated. E.g.: Text, numbers, sound, or video, Or any combination of these.

Medium - physical path by which a message travel. E.g.: twisted pair, coaxial cable, fiber optic cable, or radio waves (terrestrial or satellite microwave)

Sender - device that sends the message. E.g.: Computer, Workstation, Telephone handset, TV, and so on.

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