Star network
A computer network with a star network topology, in its simplest form, consists of one central, or hub computer which acts as a router to transmit messages between connected computers by a store-and-forward or switching system. A hierarchical extension of the star topology allows each node connected by a hub to in turn play the role of a hub for a disjoint set of leaf nodes. In this case multiple routes may exist between any two given nodes of the network.
Comparing star networks to other types of network
Advantages
- Easy to implement and extend
- Well suited for temporary networks (quick setup)
- Typically the least cheapest topology to implement
- Failure of one station does not affect others
Disadvantages
- Difficult to administer/troubleshoot
- Limited cable length and number of stations
- A cable break can disable the entire network
- Maintenance costs may be higher in the long run
- Performance degrades as additional computers are added
