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Advantages and Disadvantages of a Bus, Ring, Star Network January 11, 2007

Posted by Daniaru in Tech.

Bus Network



  • Easy to implement and extend
  • Well suited for temporary networks (quick setup)
  • Initially less expensive than other topologies
  • Cheap


  • Difficult to administer/troubleshoot.
  • Limited cable length and number of stations.
  • If there is a problem with the cable, the entire network goes down.
  • Maintenance costs may be higher in the long run.
  • Performance degrades as additional computers are added or on heavy traffic.
  • Low security (all computers on the bus can see all data transmissions).
  • One virus in the network will affect all of them (but not as badly as a star or ring network).
  • Proper termination is required.(loop must be in closed path).
  • If one node fails, the whole network will shut down.
  • If many computers are attached, the amount of data flowing causes the network to slow down.

Ring Network



  • Data is quickly transferred without a ‘bottle neck’. (very fast, all data traffic is in the same direction)
  • The transmission of data is relatively simple as packets travel in one direction only.
  • Adding additional nodes has very little impact on bandwidth
  • It prevents network collisions because of the media access method or architecture required.


  • Data packets must pass through every computer between the sender and recipient therefore this makes it slower.
  • If any of the nodes fail then the ring is broken and data cannot be transmitted successfully.
  • It is difficult to troubleshoot the ring.
  • Because all stations are wired together, to add a station you must shut down the network temporarily.
  • In order for all computers to communicate with each other, all computers must be turned on.
  • Total dependence upon the one cable

Star Network



  • Good performance
  • easy to set up and to expand. Any non-centralised failure will have very little effect on the network, whereas on a ring network it would all fail with one fault


  • Expensive to install
  • Extra hardware required


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