The simplest topology to understand is the Bus. In a Bus, all the devices on the network are connected to a common cable. Normally, this cable is terminated at either end, and can never be allowed to form a closed loop. Figure One shows an example of a Bus network.
An important characteristic to remember in bus topologies is that all data signals are broadcast throughout the bus structure. It is necessary to have an addressing mechanism so that each node understands which messages it is to receive and which to ignore.
