Networking |
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A local area network is a computer
network covering a small physical area, like a home, office, or small group
of buildings, such as a school, or an airport. The defining characteristics
of LANs, in contrast to wide-area networks (WANs), include their usually
higher data-transfer rates, smaller geographic place, and lack of a need for
leased telecommunication lines.
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Wide Area Network
is a computer network that covers a broad area (i.e., any network whose
communications links cross metropolitan, regional, or national boundaries).
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Wireless communication
is the transfer of information over a distance without the use of
electrical conductors or "wires".
The distances involved may be short (a few meters as
in television remote control) or long (thousands or millions of
kilometers for radio communications). When the context is clear, the
term is often shortened to "wireless". Wireless communication is
generally considered to be a branch of telecommunications.
It encompasses various types of fixed,
mobile, and portable two way radios, cellular telephones, personal
digital assistants (PDAs), and wireless networking. Other examples of
wireless technology include GPS units, wireless computer mice, keyboards
and headsets, satellite communications and cordless telephones.
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