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NETWORK TOPOLOGY (RING TOPOLOGY (PHYSICAL TOPOLOGY
All computers and…
NETWORK TOPOLOGY
BUS TOPOLOGY
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PHYSICAL TOPOLOGY
:star:All computers and devices are connected to a single central cable called backbone.
:star:All computers and devices connect on a single central cable (backbone) through T-connecter
:star:A terminator is required at each end of the bus cable to prevent the signal from bouncing back and forth on the bus cable .
ADVANTAGES
:explode:Bus network is simple , inexpensive and easy to install.
:explode:Computers and other devices can be attached and detached at any point on the bus without disturbing the rest of the network .
:explode:The failure of one device usually does not affect the rest of the bus network .
DISADVANTAGE
:pen:All system on the network connect to asingle cable or backbone. a break in the cable will prevent all system from accessing the network.
:pen:A bus network with more than a few dozens computers is likely to perform poorly.
:pen:Only one computers can transmit at a time .
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:fire:The bus in a bus network transmit data , instruction, and information as a series of signal .
:fire:Those signal are sent as electrical pulses that travel along the length of the cable in all directions .
:fire:The bus in a bus network transmit data , instruction and information in both directions.
:fire:when a sending device transmit data , the address of the receiving device is include with the transmission so that the data is routed to the appropriate receiving device.
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RING TOPOLOGY
PHYSICAL TOPOLOGY
- All computers and devices are arranged along a closed loop called ring.
ADVANTAGES
- The transmission of data is relatively simple as packets travel in one direction only.
- Cable faults are easy to located , making troubleshooting easier .
- The uses of token passing enables all devices in a ring topology to share the network resources fairly .
DISADVANTAGES
- A failure in any cable or device breaks then loop and can take down the entire network.
- Data packets must pass through every computer therefore this makes it slower.
- A ring networkcan span a larger distance than a bus network but it is more difficult to install.
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LOGICAL TOPOLOGY
- Data transmitted on a ring network travels from device to device around the ring in one direction (clockwise ir anticlockwise)
- Token passing is one method fopr sending data around a ring.
- Each device takes a turn sending and receiving information through the use of a token .
- Only the device with the token is allowed to send data. All other devices must wait for the token to come to them .
STAR TOPOLOGY 
physical topology :star:
All the computers and other devices on the network connect to central device called hub/switch.
Logical Topology :star:
All data that transfers from one device to another passes through the hub/switch.
ADVANTAGES :smiley:
:check:if one device fails,only that device is affected.
:check:Devices can be added to or removed from network with little or no disruption.
:check:More than one computer can send data at the same time.
DISADVANTAGE :unamused:
:red_cross:If the hub/switch fails,the entire network will be inoperable.
:red_cross:Requires more cable than most of the other topologies.
:red_cross:More expensive because of the cost of the hub/switch.
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