The topology of a network concerns the physical configuration of the devices and the cables
that connect them.
Three principle topologies are used for local area networks:
1. Bus network
On the bus network all connected hosts are sharing the same cable. All the hosts must use
the same communication speed and every host ”hears” all traffic on the cable.
2. Ring network
In the ring topology all hosts are connected into a ring. Every host in the ring receives all data
that is passing. If the data has another destination address, the host will re-transmit the data
into the ring. The data will continue to travel in this way until it reaches the destination host.
3. Star network
A star configuration includes a central controller which could be a hub or a switch. Every
host is directly connected to a port on the central controller.