In star topology (Figure), each communicating device is connected to a central node, which is a networking device like a hub or a switch, as shown in Figure.
Star topology is considered very effective, efficient and fast as each device is directly connected with the central device. Although disturbance in one device will not affect the rest of the network, any failure in a central networking device may lead to the failure of complete network.
A star topology
The central node can be either a broadcasting device means data will be transmitted to all the nodes in the network, or a unicast device means the node can identify the destination and forward data to that node only.
