Question

what is LAN ?
Where is it used

Answer 1

LAN is the short form of Local Area Network. It is used in limited geographical area, building for networking.

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Answer 2

local-area network

A local-area network (LAN) connects the computer hardware in a localized area such as an office or home. Typically, LANs use wired connections to link the computers to each other and to a variety of peripheral devices such as printers.