BUS TOPOLOGY

PHYSICAL

º Consists of :

i. Single central cable (backbone)
-used to connect all nodes on the network.

ii. T-connector
-used to attach nodes to the backbone.

iii. Terminator (at each end of the backbone)
-used to prevent signals bounce when the signal reaches the end of the cable.
bus

LOGICAL

º When a computer sends out a data signal,the data signal travels along the central cable in both directions from the sending device.
º The address of the receiving device is included with the transmission so the dta signal is routed to the appropriate receiving device.
º Only one node can send data signal at one time in order to prevent data collision.
º the collision destroys both signals.Why?
-because they do not 'hear' their own transmission within a given period of time.

ADVANTAGES	DISADVANTAGES
1. Inexpensive and easy to install as it require less cable. 2. Easy to add or remove nodes because it doesn't affect the network. 3. Failure of one node doesn't affect the network because the transmission simply by passes the failed device.	1. Only one computer can transmit data at one time. 2. Network performance decrease when the number of nodes increase. 3. If backbone breaks, the whole network failed.

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