A network topology refers to the interconnection of various nodes of a computer network. In other words, it defines the layout of the various devices that are part of the computer network.Topology is the virtual "shape" of the network, but it may not actually represent the actual physical design of the network that the various devices are connected to each other.
There are two types of network topologies: physical and logical.

A physical topology refers to the physical design of the computer network that includes the computers and other devices, their location and the various cables installed in the network.

A logical topology means the mode of flow of data in the network in contrast to its physical arrangement.

There are mainly six types of network topologies listed as under:

• bus
• star
• ring
• tree
• mesh
• hybrid