In tree topology, the devices are arranged in a tree fashion similar to the branches of a tree. Devices at lower level are connected to devices at next higher level, which resembles a tree like structure. At higher levels of the tree, often point-to-point or point-to-multipoint connections are used.
Tree topology based networks has a hierarchical structure as shown in below image. Structure of network in below image resembles an inverted tree.
Tree topology based networks are not suitable for small networks because of the requirement for additional devices and cables.
Tree topology is suitable for large networks, spread into many branches. Example: Big university campuses, hospitals etc.
Main disadvantage of tree topology is that the connectivity between tree branches are dependent on main backbone switches. If there is no redundancy solution applied at backbone switches, connectivity between branches will fail.