In computing, a network is two or more computers connected for the purpose of routing, managing, and storing rapidly changing data. A local area network (LAN) is restricted by distances of up to 1.6 kilometres. A wide area network (WAN) connects large numbers of nodes over long-distance communications links, such as common carrier telephone lines, over distances ranging from that between major metropolitan centres to that between continents. Connect two or more networks together and you have an internet. The internet is the best known network technology, but this term also refers to mobile phone technology, voice over IP telephony (VoIP), satellite communications, and other forms of communication that are still in their infancy.
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Source: Columbia Encyclopedia on Answers.com and APC ICT Policy Handbook
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