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L
LAN Local Area Network a computer network that spans a
relativel
y
small area sharin
g
common resources. Most
LANs are confined to a single building or group of
buildings.
N
NAT Network Address Translator
g
enerall
y
applied b
y
a
router, that makes man
y
different IP addresses on an
internal network appear to the Internet as a sin
g
le
address. For routin
g
messa
g
es properl
y
within
y
our
network, each device requires a unique IP address. But
the addresses ma
y
not be valid outside
y
our network.
NAT solves the problem. When devices within
y
our
network request information from the Internet, the
requests are forwarded to the Internet under the router's
IP address. NAT distributes the responses to the proper
IP addresses within your network.
Network A network consists of a collection of two or more
devices, people, or components that communicate with
each other over ph
y
sical or virtual media. The most
common types of network are:
LAN – (local area network): Computers are in close
distance to one another. The
y
are usuall
y
in the same
office space, room, or building.
WAN – (wide area network): The computers are in
different geographic locations and are connected b
y
telephone lines or radio waves.