Bus #

All computers connected together in-line or on a bus. Not fault tolerant

Ring #

All connected in a loop or ring. Not fault tolerant

Star #

All devices connected to a hub Fault tolerant

Hybrid #

Early network systems shrank the bus and ring into a box.

Physical topology #

Physically how the network looks.

Logical topology #

Logically how the network functions. (i.e. ring or bus)

Star-ring and star-bus topologies #

Eventually star-ring lost market share and now star-bus is the predominant topology in use.

Mesh #

Wireless network topologies.

Partially Meshed #

At least 2 devices have redundant connections.

Fully Meshed #

Every device connects directly to every other device.