BUS TOPOLOGY
In communications technology, you think of a bus as a common “highway” on which data is transmitted. A bus refers to the main physical pathway or central cable where all other devices are connected to it. Like a major motor highway, all traffic flow will be affected if this main “road” is broken.
A bus topology consists of a single central cable to which all computers and other devices connect. A bus topology is also known as a bus network.
RING TOPOLOGY
A ring topology consists of all computers and other devices that are connected in a loop. Ring topology is also known as a ring network.
A ring network can be found in Local Area Networks. In a ring network each node
directly connect to two neighbouring nodes.
A server may exist in a ring network, but it will not connect to all the nodes in the network.
STAR TOPOLOGY
In the early days of computer networking, all computers were connected to a centralised mainframe computer.
All resources and management of information were centred in this main computer.
The idea of a centralised mainframe computer is where the basic concept of a star topology comes from.
A star topology consists of a central host which acts as the centre, and all nodes connect to the host. A star topology is also known as star network.