Briefly describe what a topology is and what the three major topologies are

What will be an ideal response?

Topologies determine not only how devices are connected to each other, but also how they access the media they use for communication. A topology is both physical and logical. A traditional star topology is configured such that a central controlling device has other networked devices connected to it by point-to-point circuits. A ring topology uses a single cable such that the cable ends meet and form a closed loop. IBM also introduced the token ring protocol, which is associated with the ring topology. The bus topology, like the ring, views its circuit as a single cable. Unlike the ring, the cable does not form a closed loop. Devices connect to the central cable, using it as a communications pipeline. The protocol most often associated with the bus topology is Ethernet.