What is Star Topology?

In star topology, workstations are not directly linked to each other but they are connected to central component, usually called a hub. All devices have a dedicated point to point dedicated link to the central controller. If a device want to send data to other device, then it sends to the controller, the controller again send it to intended device. If the signal becomes weak before reaching to its intended node, then hub boost up the message and sends it to intended node.

Star Topology

Advantages of Star Topology

- Star topology is less expensive than mesh topology.

- Star topology is easy to install and reconfigure.

- It is robust because if one link fails, then only that link doesn't works, all other links remain active.

- New devices can be add and delete easily.

- It provides centralization. 

Disadvantages of Star Topology

- Dependency to central controller, usually a hub. If the hub goes down, while system will shut down.

-  It is costly because hub, switch increases overall cost.

- There is a limit how much devices can be added, which depends on central controller (hub or switch).