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A local area network (LAN) is a computer network that interconnects computers within a limited area such as a residence, school, laboratory, or office building. A local area network is contrasted in principle to a wide area network (WAN), which covers a larger geographic distance and may involve leased telecommunication circuits, while the media for LANs are locally managed. Ethernet over twisted pair cabling and Wi-Fi are the two most common transmission technologies in use for local area networks. Historical technologies include ARCNET, Token Ring, and AppleTalk. ==History== The increasing demand and use of computers in universities and research labs in the late 1960s generated the need to provide high-speed interconnections between computer systems. A 1970 report from the Lawrence Radiation Laboratory detailing the growth of their "Octopus" network gave a good indication of the situation. Cambridge Ring (computer network) was developed at Cambridge University in 1974 but was never developed into a successful commercial product. Ethernet was developed at Xerox PARC in 1973–1975,〔(【引用サイトリンク】title=Ethernet Prototype Circuit Board )〕 and filed as . In 1976, after the system was deployed at PARC, Metcalfe and Boggs published a seminal paper, "Ethernet: Distributed Packet-Switching for Local Computer Networks." ARCNET was developed by Datapoint Corporation in 1976 and announced in 1977. It had the first commercial installation in December 1977 at Chase Manhattan Bank in New York. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Local area network」の詳細全文を読む スポンサード リンク
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