Example of fibre distributed data interface (FDDI) is :

FDDI (Fiber Distributed Data Interface) is a standard for transmitting data over fiber-optic cable in a LAN/MAN at high speed (100 Mbps). It uses token-passing as its media-access mechanism — a token circulates around the network and only the station holding it may transmit — and it is wired as a dual, counter-rotating ring: a primary ring that carries traffic and a secondary ring held in reserve for fault tolerance.

Because FDDI's defining MAC method and physical layout is dual-ring token passing, it is essentially a high-speed, fiber-optic descendant of Token Ring technology (traditionally IEEE 802.5) — FDDI extends the same token-circulation idea to two rings running over optical fiber instead of one ring over copper.

• Token Bus: stations are wired along a single shared physical bus, and the token moves in a logical order independent of the cable layout — a different wiring scheme from FDDI's.

• Star topology: every station connects to one central hub/switch, unlike FDDI, which has no single central connection point.

• Mesh topology: every device has a dedicated link to every other device, unlike FDDI, whose stations are wired only into the ring.

So the topology/mechanism that FDDI is an example of is Token ring.