NETWORK TOPOLOGY
NETWORK TOPOLOGY
A network topology refers to the layout of the computers and devices in a communications network.- It refers to the physical and logical layout of a network.
Physical topology: The arrangement of cabling is the physical topology.
Logical topology: The path that data travels between computers on a network is the logical topology.
TYPES OF NETWORK TOPOLOGY
- STAR NETWORK
- BUS NETWORK
- RING NETWORK
STAR NETWORK TOPOLOGY
Definition: All the computers and others devices on the network connect to a central device, thus forming a star.
Advantages :
👉If one devices fails, only that device is affected.
👉Devices can be added or removed from network with no discruption.
👉Easy to troubleshoot and isolate problem.
Disadvantages:
👉If the hub or a switch fails, the entire network will be inoperabled.
👉Requires more cables than most of the other topologies.
👉More expensive because of the cost of hub/switch.
Definition:On a ring network, a cable forms a closed loop (ring) with all computers and devices arranged along the ring.
Advantages:
👉Transmission of data is simple as packets travel in one direction only.
Advantages :
👉If one devices fails, only that device is affected.
👉Devices can be added or removed from network with no discruption.
👉Easy to troubleshoot and isolate problem.
Disadvantages:
👉If the hub or a switch fails, the entire network will be inoperabled.
👉Requires more cables than most of the other topologies.
👉More expensive because of the cost of hub/switch.
BUS NETWORK TOPOLOGY
Definition: A bus
network consists
of a single
central cable
(backbone), to
which all computers
and other
devices connect.
Advantages:
👉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.
Disadvantages:
👉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 to identify
the problem if
the entire network Shut
down.
Definition:On a ring network, a cable forms a closed loop (ring) with all computers and devices arranged along the ring.
Advantages:
👉Transmission of data is simple as packets travel in one direction only.
👉Cable
faults
are easily located,
making troubleshooting easier.
👉All
devices in ring topolgy
share the network
resources fairly.Disadvantages:
👉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
👉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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