o A LAN is usually Privately owned and
Links the devices in a single office, Building
or
a campus
o Two Implications
Care
must be taken
in choice of
a LAN, because
there may be
a substantial
capital
investment for purchase and maintenance.
Secondly,
the network management responsibility falls
solely on the
user/company
o Size of a LAN
Size
of a LAN
depends upon the
Needs of Organization and
the Type of
Technology
LAN can be as simple as two PCs and a
printer in someone's home office or it
can
extend throughout a company and include complex equipment too
Currently LAN size is limited to a few
kilometers
o Design of a LAN
LANs are designed to allow resources to be
shared between personal computers or
workstations
The
resources to be
shared can include
hardware (printer), software
(an
application
program) or data.
Example of a LAN
A common
example of a
LAN found in
many business environments links
a
work group
of task related
computers, for example
engineering workstations
or Accounting
PCs. One of
the PCs may
be given a
large capacity disk
and
becomes a
server to others.
Software stored on
the server and
is used by
the
whole
group. In this case size is determined by software licenses
o Transmission Media & Topology
In
addition to size,
LANs are distinguished from
other types of
networks by
Transmission
media and topology
In general a given LAN will use only one
type of Transmission medium
The most common LAN topology Bus, Star
Ring
o Data Rates in a LAN
Traditionally 4 - 16 Mbps
Speeds increased and now 100Mbps and above
are also possible
Giga Bit LAN technologies
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