What are the disadvantes of star network?

Answer 1

A star network provides good performance, is easy to install and expand. Failures out in the network don't tend to impact other nodes (unlike ring networks, for example, which fail completely when a node goes down or else require elaborate double-ring schemes to cope). A classically-cited disadvantage is that it's "expensive to install" and quite a bit of hardware (e.g. hubs/switches) is required. If you look at ethernet though (the king of modern networks more due to economy than to efficiency), it tends lend naturally to star configuration.