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, 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

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

de:Sterntopologie zh:星型网