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Star

It is an implementation of a spoke-hub distribution paradigm in computer networks. Every host is connected to a central hub. In its simplest form, one central hub acts as a conduit to transmit messages.

Data passes through the hub before continuing to its destination. The hub manages and controls all functions of the network. It also acts as a repeater for the data flow.

Advantages​

  • Reduced impact of node/connection failure.

The star topology reduces the impact of a transmission line failure by independently connecting each host to the hub. The failure of a transmission line linking any host to will result in the isolation of that host from all others, but the rest of the network will be unaffected.

  • Devices can be added or removed without disturbing the network.

  • Works well under heavy load.

  • Appropriate for a large network.

Disadvantages​

  • Expensive due to the number and length of cables needed to wire each host to the central hub.

  • The central hub is a single point of failure for the network.