What is Computer Network?
A computer network is a group of interconnected computers . Networks may be classified according to a wide variety of characteristics. This article provides a general overview of some types and categories and also presents the basic components of a network. A network is a collection of computers and devices connected to each other. The network allows computers to communicate with each other and share resources and information. The Advance Research Projects Agency ( ARPA ) designed "Advanced Research Projects Agency Network" ( ARPANET ) for the United States Department of Defense. It was the first computer network in the world in late 1960's and early 1970's. Network topology: Computer networks may be classified according to the network topology upon which the network is based, such as bus network , star network , ring network , mesh network , star-bus network , tree or hierarchical topology network . Network topology signifies the way in which devices in th...