1) It is easy to detect the source of a media failure. 2) Very few devices on the network are affected by a media failure. 3) They are easy to reconfigure. 4) Other advantages include isolation of devices and benefits from centralization
1) If the hub fails, the whole system is dead.
2) If the hub, switch, or concentrator fails, nodes attached are disabled.
3) Requires more cable length than a bus topology.
4) More expensive than bus topologies because of the cost of the hubs, etc.
In local area networks where the star topology is used, each machine is connected to a central hub. The star topology allows each machine on the network to have a point to point connection to the central hub. All of the traffic which transverses the network passes through the central hub. The hub acts as a signal booster or repeater which in turn allows the signal to travel greater distances.
StAr ToPoLoGy
RiNg ToPoLoGy
BuS ToPoLoGy
In local area networks where the ring topology is used, each computer is connected to the network in a closed loop or ring. The signal passes through each machine or computer connected to the ring in one direction, from device to device, until it reaches its destination. Each machines or computers connected to the ring act as signal boosters or repeaters. When a device receives a signal intended for another device, its repeater regenerates the bits and passes them along.
In local area networks where bus technology is used, each machine is connected to a long, single cable. The cable acts as a backbone to link all the devices in a network. Each computer or server is connected to the single bus cable through drop lines and some kind of connector. A terminator is required at each end of the bus cable to prevent the signal from bouncing back and forth on the bus cable.
1) Easy to connect a computer or