(Physical and logical)
PHYSICAL TOPOLOGY - The arrangement of a cabling
LOGICAL TOPOLOGY - The path that data travels between computers on a network
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CATEGORY
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STAR TOPOLOGY
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RING TOPOLOGY
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BUS TOPOLOGY
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DEFINITION
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All the computers
and other devices
on the network
connect to a
central device,
thus forming a
star.
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On a ring
network,
a cable forms a
closed loop
(ring)
with all
computers
and devices
arranged
along the ring.
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A bus network
consists of a
single central
cable (backbone),
to which all
computers and
other devices
connect.
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ADVANTAGES
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·
If one device fails,only that device is affected.
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Devices can be added or removed from network with no
disruption.
·
Easy to troubleshoot and isolate
problem
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·
Transmission of data is simple as packets travel in one direction
only.
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Cabel faults are easily located, making troubleshooting easier.
·
All devices in ring topolgy share the network resources fairly.
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·
Inexpensive and easy to install.
·
Other devices ca be attached or detached without disturbing the
network.
·
Failure of one device usually does not affect the rest of the network
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DISADVANTAGES
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·
If the hub or switch fails, the entire network will be inoperabled.
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Requires more cables than most of the other topologies
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More expensive
because of the
cost of hub/switch
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·
A failure in any cable or device breaks the loop and can take down
entire network.
·
Data packets must pass through every
computer, thus make
it slower.
·
More difficult to
install than a
bus network
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·
There might be disruption when computer or other devices are added or
removed.
·
The break in the main cable (backbone) will prevent all systems from
accessing the network.
·
It is difficult toidentify the problem if the entire network Shut
down.
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