A computer network , or simply a network , is a collection of computers andother hardware components interconnected by communication channels that allow sharing of resources and information. [ 1 ] Where at least one process in one device is able to send/receive data to/from at least one process residing in a remote device, then the two devices are said to be in a network. Simply, more than one computer interconnected through a communication medium for information interchange is called a computer network.Networks may be classifiedaccording to a wide varietyof characteristics, such as the medium used to transport the data, communications protocol used, scale, topology , benefit, and organizationalscope.Communications protocols define the rules and data formats for exchanging information in a computer network, and provide the basis for network programming . Well-known communications protocols include two Ethernet , a hardware and link layer standard that is ubiquitousin local area networks , andthe Internet protocol suite , which defines a set of protocols for internetworking, i.e. for data communication between multiple networks, as well as host-to-host data transfer, and application-specific data transmission formats.Computer networking is sometimes considered a sub-discipline of electrical engineering , telecommunications , computer science , information technology or computer engineering , since it relies upon the theoretical and practical application of these disciplines.
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