Q. What do you mean by Star Topology?
Star Topology: In Star topology, all user nodes are connected to central node point that interconnects all individual users' links and nodes. Data flows from one node, through star centre to desired receiving node. Central node is like a large switch that routes the data from the input line to output line. Advanced central nodes can have multiple switching paths, so many paths exist at the same time. This topology is used in a telephone system central office. Addition of a new user node requires running only a single link from star centre to user without disturbing any other node.