A star topology is designed with each node connected directly to a central device called as a network switch. Each workstation has a cable that goes from its network card to a network switch.
popular and widely used LAN technology Ethernet currently operates in STAR topology.
Advantages of star topology
* Easy to install and wire.
* network when connecting or removing devices.
*Easy to directly faults and to remove parts.
Disadvantages of STAR topology
*Requires more cable length than a liner bus topology.
*If the connecting network devices fails,nodes,attached are disabled and cannot participate in network communication.
*More expensive than liner bus topology because of the cost of the connecting
A bus topology consists of a main run of cable with a terminal at each ends. All like workstation, printers,laptops,server …etc, are connected to the liner cable. The absorb the single when the single reaches the ends,preventing single bounce.When the using bus topology ,when a computer sends out a single, the single travel the cable length in both direction from the sending computer, when the single reaches the end of the cable length , it bounce back and returns in the direction it came from.This is know as single bonce. Single bounce will create problem in the network, because another network single sent on the cable length at the same time , the two single will collide.
* easy connect a computer or peripheral to a liner bus.
* Requires less cable length than a star topology.
*Entire network shuts down if there is a break in the main cable.
*Terminators are required at both of the backbone cable.
*Not mean to be used as a stand alone solution.