Network topology refers to the physical and logical arrangement of nodes and connections in a computing network. There are two types of network topology: physical and logical topology. Physical topology is the geometric representation of all the nodes in a network, and there are six types of physical topology: Bus Topology, Ring Topology, Tree Topology, Star Topology, Mesh Topology, and Hybrid Topology. Logical topology, on the other hand, refers to the way data flows in a network and how devices communicate with each other. Some common types of logical topology include peer-to-peer, client-server, and hybrid topology.