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A computer network is a group of computers linked to each other that, enables the computer to communicate with another computer and share, their resources, data, and applications., , A computer network can be categorized by their size. A computer, network is mainly of four types:, , Types Of Computer, Network, , WAN, , , , o LAN(Local Area Network), o PAN(Personal Area Network), o MAN(Metropolitan Area Network), , o WAN(Wide Area Network)