Star Topology

Advantages

▸ Due to its centralized nature, the topology offers simplicity of operation. 
▸ It also achieves isolation of each device in the network.
▸ Adding or removing network nodes is easy, and can be done without affecting the entire network.
▸ Due to the centralized nature, it is easy to detect faults in the network devices.
▸ As the analysis of traffic is easy, the topology poses lesser security risk.
▸ Data packets do not have to pass through many nodes, like in the case of a ring network. Thus, with the use of a high-capacity central hub, traffic load can be handled at fairly decent speeds.

Disadvantages

▸ Network operation depends on the functioning of the central hub. Hence, central hub failure leads to failure of the entire network.
▸ Also, the number of nodes that can be added, depends on the capacity of the central hub.
▸ The setup cost is quite high.