Wide Area Network (WAN

A network that spans broader geographical area than a local area network over public communication network. WANs interconnect LANs, which then provide access to computers or file servers in other locations. Multiple LANs can be connected together using devices such as bridges, routers, or gateways, which enable them to share data. To cover great distances, WANs may transmit data over leased high-speed phone lines or wireless links such as satellites.

The world's most popular WAN is the Internet.

WANs connect user networks over a large geographical area, they make it possible for businesses to communicate across great distances. WANs allow computers, printers, and other devices on a LAN to be shared with distant locations. WANs provide instant communications across large geographic areas. 

WANs are designed to do the following: 

  • Operate over a large and geographically separated area 
  • Allow users to have real-time communication capabilities with other users 
  • Provide full-time remote resources connected to local services 
  • Provide e-mail, Internet, file transfer, and e-commerce services 

WAN include following technologies : 

  • Modems 
  • Integrated Services Digital Network (ISDN)
  • Digital subscriber line (DSL) Synchronous Optical Network (SONET)


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