This document summarizes different network topologies including physical topologies like bus, ring, star, mesh and tree as well as hybrid topologies. It describes the key features, advantages and disadvantages of each topology. Physical topologies discussed include how a bus topology transmits data in one direction along a cable, how a ring topology forms a sequential ring, and how a star topology connects all nodes to a central hub. Hybrid topologies combine two or more physical topologies to leverage their advantages while addressing disadvantages.