What is the physical topology of FDDI?

Concept

The physical topology of a network describes the actual arrangement of its nodes and links.

In a ring topology, nodes form a closed loop. A dual-ring design adds a second counter-rotating path to improve fault tolerance.

Application

FDDI uses two counter-rotating token rings. Under normal operation, traffic uses the primary ring. After a link or station failure, the rings can wrap to maintain a continuous path.

Contrast

• A bus uses one shared linear backbone rather than a closed loop.

• A star places a hub or switch at the center rather than connecting nodes around a loop.

• The defined FDDI arrangement is represented by one of the named topologies.

Cross-check

The ability of the secondary path to restore a loop after a fault is characteristic of a dual-ring design.

Result

Therefore, the physical topology of FDDI is Ring.