Alternatively referred to as a star bus topology, tree topology is one of the most common network setups that is similar to a bus topology and a star topology. A tree topology connects one star network to other star networks. Below is a visual example of a tree topology, with a simple computer set up on a network using the star topology, connected to another network using the star topology.
In the picture above, if the main cable or trunk between each of the two star topology networks was to fail, those networks would be unable to communicate with each other. However, computers on the same star topology would still be able to communicate with each other.