Data communications refers to the transmission of this digital data between two or more computers and a computer network or data network is a telecommunications network that allows computers to exchange data. The physical connection between networked computing devices is established using either cable media or wireless media. The best-known computer network is the Internet.

This tutorial should teach you basics of Data Communication and Computer Network (DCN) and will also take you through various advance concepts related to Data Communication and Computer Network.

DATA COMMUNICATIONS1-1 DATA COMMUNICATIONS The termThe term telecommunicationtelecommunication means communication at ameans communication at a distance. The worddistance. The word datadata refers to information presentedrefers to information presented in whatever form is agreed upon by the parties creatingin whatever form is agreed upon by the parties creating and using the data. and using the data. Data communications are there the exchange of data between two devices via some form of exchange of data between two devices via some form of transmission medium such as a wire cable. transmission medium such as a wire cable. Components Data Representation Data Flow Topics discussed in this section: Topics discussed in this section:

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