Star Topology:
The star network topology is frequently used to connect one or more small computers or peripheral devices to a large host computer. Many organizations use the star network or a variation of it in a time sharing system, in which several users are able to share a central processor.
Star network is frequently used in a LAN to connect several micro computers to a central unit that works as communication controller. Another common use of the star network is as a LAN to connect several microcomputers to a mainframe that allows access to an organization database.
The star topology as shown above has minimum line cost as only 4 lines are used. The routing function is performed two nodes by establishing a logical path between them. The system, however, crucially depends on E. If E breaks down the whole network would breakdown.
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