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CHARACTERISTICS
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BUS TOPOLOGY
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RING TOPOLOGY
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STAR TOPOLOGY
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DIAGRAMS
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| DEFINITION/PHYSICAL TOPOLOGY |
A bus network consists of a single central cable (backbone/trunk), to which all computers and other devices connect (node). |
On a ring network, a cable forms a closed loop (ring) with all computers and devices arranged along the ring. |
All the computers and other devices on the network connect to a central device (hub/switch), thus forming a star. Two
types of devices that provide a common central connection point to all
the other devices on the network are a hub and a switch.
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| LOGICAL TOPOLOGY |
In
a bus network, it transmit data, instructions, and information (the
address of the receiving device is included) as a series of signal in
both directions where all nodes receive the signal but only intended
recipient will accept the signal and the rest will ignore. |
Data
transmitted on a ring network travels from device to device around the
entire ring, in one direction (clockwise or counterclockwise) until it
reach its destination by using token. Token passing is one method for sending data around a ring. Each device takes a turn sending and receiving information through the use of a token. Token is a special series of bit that functions like a ticket.
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In a star network, data, instructions, and informations transfer from one node to another node passes through hub/switch. If
the network used hub, the signal will send to all nodes but only the
intended recipient will accept the signal and the rest will ignore. If the network used switch, the signal will send directly to the intended recipient.
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| ADVANTAGES |
Failure of one device usually does not affect the rest of the bus network. Bus network are inexpensive and easy to install. Computers and other devices can attached and detached at any point on the bus without disturbing the rest of the network.
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All computers have equals access to the resources in the network. Cable faults are easily located, making troubleshooting easier. Data packet are flowing in one direction at high speed around the ring.
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If one device fails, only that device is affected. Devices can be added to or removed from network with little or no disruption. Easy to troubleshoot and isolate problem.
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| DISADVANTAGES |
The network will be malfunctioned if the single central cable break down. A break in the backbone (single central cable) will prevent all systems from accessing the network. If more computers are connected, the performance of the network will become slower because of data collision. It is difficult to identify the problem if the entire network shut down.
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The network will be malfunctioned if the device or cable break down. A ring network can span a larger distance than a bus network, but it is more difficult to install. Data packets must pass though every computer therefore, this makes it slower.
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