Tree topology is a network arrangement that follows a hierarchical structure. It looks like a tree with a central root node from which all other nodes branch out. What is Tree Topology? Tree topology, also referred to as hierarchical topology, is a network structure where each node is interconnected in a hierarchical manner, resembling the branches of a tree. A tree topology is a type of network topology that resembles a tree, with a root node at the top and leaves at the bottom. In computer networking, tree topologies are often used to create virtual LANs (VLANs). Learn what tree topology is, how it works, and its advantages and disadvantages. See different types of tree topologies and examples of networks that use them.