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A STAR-topology consists of one central node (e.g. mainframe, HUB) and the workstations. If today someone use a STAR-topology he will use a HUB because it is cheaper than a mainframe. A HUB is a central linking up station which sends the data to terminals. The central point, the heart, of the network is the HUB and each terminal or computer has a connection to the HUB.
Data Transmission:
If one computer sends a message to another computer the transmitter sends the message package with the destination address to the HUB. The HUB is intelligent enough to send the message to the correct com-puter.
If one computer breaks down it doesn¡¦t affect the other computers and the network doesn¡¦t break down. Only if the HUB breaks down the net-work can¡¦t work.
Advantage:
"³ the network doesn¡¦t break down if one computer has a failure
Disadvantages:
"³ high cable consumption
"³ if the HUB has a failure the network breaks down
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