When a device on BUS Topology wants to send a message to another nod, it first finds out the destination address. Then it checks that whether the Communication Line is free or not! As soon as the communication line becomes free, the message is broadcasted on the line. The signal travels to the destination node by passing all the nodes that are on its way. As the message travels on the line, each node checks that whether the message is addressed to them or not. When the addressee node receives the message successfully, it sends an acknowledgement to the sender/source node. Then the transmission line becomes free. In this case, all nodes will receive the message, but the addressee node has to respond back.
Easy to install nodes.
As all devices share a common channel, fewer wires and lines are necessary.
Failure of single node does not affect the process of data flow.