Wide Area Network provides no limit of distance. In most WANs, the subnet consists of two distinct components. Transmission lines also called circuits or channels or links and switching and routing devices (switches & routers). Transmission-lines are used for moving bits between machines, whereas routers are used to connect two or more transmission lines.
A WAN provides long distance transmission of data, voice, image and video information over large geographical areas that may comprise a country, a continent or even the whole world.
In contrast to LANs (which depend on their own hardware for transmission), WANs may utilise public, leased or private communication devices usually in combination and span own unlimited number of miles.
A WAN that is wholly owned by a single company is often referred to as an enterprise network.
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