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A wide area network (WAN) is a physical or logical large network that allows multiple devices to communicate with each other. They are very wide networks that allow local area networks to connect together. The most famous wide area network is Internet.

LAN (Local Area Network) A given area is the name given to the network that connects computers to each other via cables. It connects computers in restricted areas such as inside buildings. It is used to share devices such as data transfer, file sharing and printers.