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In star topology, the network computers are linked to a piece of hardware called a hub. This is a box which contains a certain number of sockets into which cables coming out of the computers can be plugged. Its role is to ensure communications between those sockets.

Star topology

Unlike networks built with bus topology, networks which use star topology are much less vulnerable, as one of the connections can easily be removed by disconnecting it from the hub, without paralysing the rest of the network. The critical point in this network is the hub, as without it, communication between the computers on the network is no longer possible.

However, a star topology network is bulkier than a bus network, as additional hardware is required (the hub).

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Posted by waqasahmad

In Star each node is connected to central HUB where as in bus each node is connected to another node so BUS require less cable

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Posted by henrymurray