The tree topology is the arrangement when we we have child parent kind of type  in the network.

It is like a parent and its child association in the network among the nodes connection.

A tree topology can be viewed as a collection of star networks arranged in a hierarchy.

This tree has individual peripheral nodes which are required to transmit to and receive from one other node only and are not required to act as repeaters or regenerators.

An example is a university campus in which each building has its own star network, and all the central computers are linked in a campus-wide system.

It is easy to add or remove workstations from each star network. Entire star networks can be added to, or removed from, the bus.

If the bus has low loss and/or is equipped with repeaters, this topology can be used in a wide area network (WAN) configuration.

In a tree network, a cable failure in one of the star networks will isolate the workstation that it links to the central computer of that star network, but only that workstation will be isolated.

All the other workstations will continue to function normally, except that they will not be able to communicate with the isolated workstation. If any workstation goes down, none of the other workstations will be affected.

If a central computer goes down, the entire portion of the network served by it will suffer degraded performance or complete failure, but rest of the network will continue to function normally. If the bus is broken, serious network disruption may occur.

If redundancy is needed, the central computers of the star networks can be interconnected in a mesh network topology.