Computer network can be divided into 3 types: LAN, MAN, and WAN. LAN (Local Area Network) systems, local area network is a network in the distance not exceeding 10 km can be a network that is the same or different buildings inside the building in the distance.MAN (Metropolitan Area Network) network is a network that is wider than a LAN might require enterprise communication network telephone. To communicate each other information exchange means in MAN consists of multiple LAN's network infrastructure. WAN (Wide Area Network) is a system of remote communication network in the country-level. Across the continent, or the world might have to use the enterprise communication network telephone or communication of. An example that is widely known is the Internet network (Internet)
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