Explain Star Topology? Explanation of Star Topology Star Topology ppt

1. Explain Star Topology
BY S. ANANTHA KUMAR
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2. Explanation of Star Topology
Star : In a star topology, each each devixe has a dedicated point to point link only
through a central controller, usually called a hub.
The devices are not directly linked to each other. A star topology does not allow
direct traffic between devices. The controller acts as an exchange. If one device wants
to send data to another, it sends the data to the controller, which then deliver the
data to the appropriate destination.
Best example of star topology is telephone network.
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3. Explanation of Star Topology
Fig : Star Topology
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4. Advantages and Disadvantages
 Advantages :
1. Less expensive than Mesh topology.
2. In a star topology each device needs only one line and only one I/O port.
3. Easy to install and reconfigure.
4. Robustness: If one link fails, only that link is effected all other links remain active.
5. Fault identification is easy.
 Disadvantages :
1. It requires long length of cable.
2. The cost of hub is high.
3. Message delay.
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