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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.1 Comparing star networks to other types of network
1.1 Advantages
- Easy to implement and extend, even in large networks
- Well suited for temporary networks (quick setup)
- Typically the cheapest topology to implement
- Failure of one station does not affect others
- Easy to administer/troubleshoot
- A cable break doesn't disable the entire network
1.2 Disadvantages
- Limited cable length and number of stations
- Maintenance costs may be higher in the long run
- Performance degrades as additional computers are added
- Failure of the central node can disable the entire network
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