What are the important topologies for networks?

Ø  BUS topology:

In this each computer is directly connected to primary network cable in a single line.

Advantages:

                        Inexpensive, easy to install, simple to understand, easy to extend.

Ø  STAR topology:

                        In this all computers are connected using a central hub.

Advantages:

            Can be inexpensive, easy to install and reconfigure and easy to trouble shoot physical problems.

Ø  RING topology:

                        In this all computers are connected in loop.

Advantages:

                        All computers have equal access to network media, installation can be simple, and signal does not degrade as much as in other topologies because each computer regenerates it.