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(LAN) Local Area Network

A local area network (LAN) is a computer network covering a small physical area, like a home, office, or small group of buildings, such as a school, or an airport. The defining characteristics of LANs, in contrast to Wide Area Networks (WANs), include their usually higher data-transfer rates, smaller geographic area, and lack of a need for leased telecommunication lines.

ARCNET, Token Ring and many other technologies have been used in the past, and may be used in the future, but Ethernet over twisted pair cabling, and Wi-Fi are the two most common technologies currently in use.