Ring: each computer is connected to the ones either ❌ of it. Data is ❌ in one direction, no reliance on ❌, but if any connection ❌ the whole network is disrupted.

Star: each ❌ is connected to a central device, which ❌ all traffic. If a connection fails, the whole network is not ❌. It is also easy to ❌ new computers to the network.

Bus: each computer is connected to a ❌ and data can travel in both directions like a ❌ route. It is easy to set up, simple to ❌ more computers, but if the ❌ fails the whole network fails.