FDDI
Fiber Distributed Data Interface
ANSI Standard for 100 Mbps over Fiber and twisted pair
Up to 500 stations on a single FDDI network
Inter-node links of up to 2km on multimode fiber, 60+ km on single mode fiber, Longer SONET links, 100 m on UTP.
Round-trip signal path limited to 200 km ? 100 km cable.