A network topology refers to
1. The layout of the computers and devices in a communications network
2. The configuration of a network that consists of cables, computers, and other peripherals .
Bus Network  A bus network consists of a single central cable (backcone/trunk) , to which all computers and other devices connect (node) |
Ring Network  On a ring network , a cable forms a closed loop (ring) with all computers and devices arranged along the ring |
Star Network  All the computers and other devices on the network connect to a central device (hub/switch) , thus forming a star . |
