1.1 Introducing Data Communication

Data communication is concerned with transferring electronic data from source to destination

Various forms of data communications exists including:

		Computer-oriented communication with the Internet being the most widely data communication networking system.
		Telecommunication systems including cellular networks and the Public Switched Telephone Network (PSTN).
		Radio and Television broadcasting communication.

A typical data communication model includes: (see Figure 1.1)

		The source: that generates data to be transmitted.
		The Transmitter: that converts source data to an electronic signal which is transmitted through.
		The Transmission medium: on which the signal representing the communicating data is transmitted.
		The Receiver: that converts the received signal at the destination side to data and forwards it to
		The Destination: that consumes the data received.

1.1 Introducing Data Communication