Difference between Bus topology and Star topology is as follows: In bus topology, all nodes are connected to server along a single length of cable. Whereas, in star topology, all nodes are connected to server individually.
Advantages of Star topology over Bus topology are:
(i) Easy to detect faults and remove it.
(ii) Failure of single system will not bring down the entire network.
Disadvantages of Star topology over Bus topology:
(i) Requires more cable length than Bus topology.
(ii) If hub or server fails, the entire network will be disabled.