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The physical star topology uses a central controlling hub with dedicated legs pointing in all directions – like points of a star. Each network device has a dedicated point-to-point link to the central hub. This strategy prevents troublesome collisions and keeps the lines of communications open and free of traffic. This topology, obviously, require a great deal of cabling. This design provides an excellent platform for reconfiguration and trouble-shooting. Changes to the network are as simple as plugging another segment into the hub and a break in the LAN is easy to isolate and doesn't affect the rest of the network. The benefits of star topology are: a. Relatively easy to configure. b. Easy to troubleshoot c. Media faults are automatically isolated to the failed segment. The disadvantages are considered as follows: a. Requires more cable than most topologies. b. Moderately difficult to install.