Each node in a star network is linked to a central hub, usually a computer or server, but not directly to other nodes. The physical and logical means a network is configured is called its topology. The physical deployment might look the same for each topology, however the inside workings of the network — its logical structure — differentiate one network architecture from another. Network diagrams usually are used to depict totally different topologies, with nodes depicted as dots and network hyperlinks proven as lines.