2. A network consists of two or more computers
that are linked in order to share resources,
exchange files, or allow electronic
communications.
The computers on a network may be linked
through cables, telephone lines, radio waves,
satellites, or infrared light beams
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3. File sharing
Resource sharing
Communication and collaboration
Remote access
Data protection
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5. Abbreviations Network
PAN Personal Area Network
LAN Local Area Network
CAN Campus Area Network
MAN Metropolitan Area Network
WAN Wide Area Network
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6. 6
Topology Advantages Disadvantage S
BUS Takes less cable Break in the Bus,
network is down
Ring Easy to install Expensive parts
Star Easy to install; most
common; break in
workstation cable,
network still works
More expensive than Bus
7. Topologies Description
Linear Bus All nodes and peripheral devices are
attached to a common backbone cable.
Ring All nodes are connected in a circular
chain.
Star All nodes are connected to a central
hub.
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9. A local area network (LAN) is a group of
computers and associated devices that share a
common communications line or wireless link.
Typically, connected devices share the
resources of a single processor or server within
a small geographic area .
. A local area network may serve as few as two
or three users or as many as thousands of
users.
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