For example, if all the computers on the network can't communicate, one can most likely pinpoint the problem to hub failure. Another positive feature of star topology is stability. If one computer goes offline, it does not halt network communications like a bus network would. All other machines connected to the hub can still communicate. While expansion is fairly easy on a bus network, it is even easier on a large star network.
Most hubs have the ability to be stacked.
Stacking is liking multiple hubs together to provide more available connection spots. So, I would plug in a cable into the hub's uplink port and connect it to another empty 5-port hub. I would then have another 5 empty ports to work with. At the end of each 10BaseT cable is an RJ-45 connector that bares a resemblance to a telephone connector. The token ring topology is the most unique of all the topologies, in that it completely changes the way a network functions.