Give two advantages and two disadvantages of Star topology.

The two advantages of star topology are:

1. Ease of service: The star topology has a number of concentration points (where connections are joined). These provide easy access for service or reconfiguration of the network.

2. One device per connection: In star topology, failure of a single connection involves disconnecting one node from an otherwise fully functional network.

The two disadvantages of star topology are:

1. Long cable length: Because each node is directly connected to the center, the star topology necessitates a large quantity of cable.

2. Central node dependency: If the central node in a star network fails, the entire network is rendered inoperable. This introduces heavy reliability and redundancy constraints on this node.