LAN, Local Area Network, Infrastructure and cables are owned by the company, A school network is an example, Situated in a small area or building, WAN, Wide Area Network, The internet is an example, Covers a large geographic area, The infrastructure is owned by a number of companys, Peer to Peer, All the computers are equal, Backups are done on individual computers, Updates are done on individual computers, Easy and inexpensive to maintain, Client Server, The nodes fit into a hierarchy, the server is top, Backups are done centrally, Updates can be done centrally, Expensive to maintain

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