Topologies are categorized as either physical network topology, which is the physical signal transmission medium, or logical network topology, which refers to the manner in which data travels through the network between devices. A Cisco network topology is used to describe the physical and logical structure of a network. A topology layout maps the way different nodes on a network, including switches and routers, and how data flows. As shown in the cisco topology layout diagram help visualize the communicating devices, which are modeled as nodes, and the connections between the devices, which are modeled as links between the nodes.
