A computer network links two or more computers so that they can exchange data and share resources including expensive peripherals such as high -performance laser printers. Let us consider a situation in which many people in an organization need to work with the same data. A copy of data can be loaded in each computer so that the employee can access the data individually. However, a more efficient method is to load the data on one computer and provide the other computers access to the data from this computer remotely. This option saves disk space on the computers and provides a central location for storing and managing the data that multiple users need to access. In other words computer network is a group of computers and associated peripherals connected by a communications channel capable of sharing files and other resources between several users.
Type of computer network: -
Today’s computer networks include computers and computer operating system associated with all of the computing models. A typical network includes main frame, personal computers, and a variety of other computers and communicating devices. Computer network fit the general definition of networking since they share electronic data and computing devices. Computer networks are often classified by size, distance covered or structure. Even though the distinctions are rapidly fading, the following network classifications are commonly used:
A. Local Area Network(LAN)
B. Metropolitan Area network(MAN)
C. Wide Area Network(WAN)
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