What is Network?
A network or communication network is a system of interconnected communication devices that can communicate with one another and share information. Therefore computer network can be defined as:
A system in which more than one computers or large number of computers are interconnected together, communicate freely with one another and share information is called computer network.
A network can be internal to an organization or span the world by connecting itself to the internet. In computer network, network operating system is used that controls and co-ordinates the activities of computers that are connected to the network. The example of these operating systems are: windows NT, UNIX, and Novell etc. read more