Wide Area Network

A WAN (wide area network) is a geographically dispersed telecommunications network and the term distinguishes a broader telecommunication structure from a local area network (LAN). A wide area network may be privately owned or rented, but the term usually connotes the inclusion of public (shared user) networks. An intermediate form of network in terms of geography is a metropolitan

DSL DigitalSubscriberLine  E1E5CarrierSystem

see also: Subnet, LAN, Network