What is Physical Topology ? or Categories of Toplogy

          The term physical topology refers to the way in which a network is laid out physically.: two or more devices connect to a link; two or more links form a topology. The topology of a network is the geometric representation of the relationship of all the links and linking devices (usually called nodes) to one another. There are four basic topologies possible: mesh, star, bus, and ring as shown in figure.

Mesh Topology
Star Topology
Bus Topology
Ring Topology