The star network has a central node which all the terminal/ computers are connected to.
the central node can be a computer that acts as a mainframe that has links going out to the computer or it can be a hub with links going out to the computers that are workstations and servers
the star network is a popular LAN used as it has more advantages in comparison to the topologies.
Polling: when nodes are accessed sequentially by the central server to see if they are ready to transmit data