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A BUS-topology is the easiest and most common structure. There exists one main cable which is called ¡§Backbone¡¨ or ¡§Bus¡¨. Every computer in the network is connected to the ¡§Bus¡¨ with a so called T-component. At the two ends of the ¡§Bus¡¨ are end resistants for the termination. That is important because if a computer signal comes to the end of the bus it would be reflected and the other signals would be overlapped.
Data transmission:
One computer wants to send a message two another computer. It sends the message package and destination address of the computer which sends the message, over the bus. Each computer compares the destina-tion address with his own address. If the address is the same the com-puter knows that the message is for him. One important fact is that just one computer can send at the same time.
Advantages:
"³ a BUS-topology is easy to administer
"³ low cable consumption
Disadvantage:
"³ if the main cable is broken the network breaks down
"³ just one message can be sent at the same time
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