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A MAN (metropolitan area network) is a
network that interconnects users with computer resources in a geographic
area or region larger than that covered by even a large local area
network (LAN)
but smaller than the area covered by a wide area network (WAN).
The term is applied to the interconnection or Data
Communications of networks in a city into a single larger
network (which may then also offer efficient connection to a wide area
network). It is also used to mean the interconnection of several local
area networks by bridging them with backbone lines. The latter usage is
also sometimes referred to as a campus network. Many predominant
MANs are utilizing Wave Division Multiplexing, SMDS, Sonet, Microwave,
and Cable networking topologies.
In many cities under the streets, Copper
and Fiber Optic cables are run. Above ground we find Wireless, Microwave
and Lasers. These technologies are typically limited to distances under
100 miles. These limitations define a MAN or Metropolitan Area Network.
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