Data Communication


Data Communication
Data communication is the exchange of information(or data) between two or more devices by some transmission medium such as wire cable. There are following components of data communication:-
1.      Message- The message is the data or information to be communicated. Some forms of data are text, numbers, pictures, audio, video etc.
2.      Sender- The sender is the device that sends the information.  It can be telephone handset, mobile, computer etc.
3.      Receiver- The receiver is the device that receives the message. It can be a computer, mobile, telephone, television etc.
4.      Transmission Medium- The transmission medium is the physical path by which a message travels from sender to the receiver. It can be twisted pair wire, coaxial cable, fiber optic cable, radio waves etc.
5.      Protocol- A protocol is a set of rules that govern the data communication.  It is  an agreement between the communicating devices. Without a protocol, two devices may be connected but not communicating, just as a person speaking Hindi can not be understood by a person who speaks only English.    

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