NETWORK

A network is defined as a group of two or more computer systems linked together. There are many types of computer networks, including the following:

local-area networks (LANs): The computers are geographically close together (that is, in the same building).

wide-area networks (WANs): The computers are farther apart and are connected by telephone lines or radio waves.

campus-area networks (CANs): The computers are within a limited geographic area, such as a campus or military base.

metropolitan-area networks MANs): A data network designed for a town or city