Fiber Distributed Data Interface


Fiber Distributed Data Interface
   Abbreviated FDDI. The ANSI X3T9.5 specification for fiber-optic networks transmitting at a speed of up to 100Mbps over a dual, counter rotating, token-ring topology. FDDI's 100Mbps speed is close to the internal speed of most computers, which makes it a good choice to serve as a super backbone for linking two or more LANs or as a fiberoptic bus connecting high-performance engineering workstations. FDDI is suited to systems that require the transfer of large amounts of information, such as medical imaging, three-dimensional seismic processing, and oil reservoir simulation. The FDDIII version of the standard is designed for networks transmitting real-timefull-motionvideo (or other information that cannot tolerate any delays) and requires that all nodes on the networkuseFDDI-II;otherwise,thenetwork automatically reverts to FDDI.
   A FDDI network using multimode fiberoptic cable can include as many as 500 stations up to 2 kilometers (1.25 miles) apart; with single-mode fiber, run length increases up to 60 kilometers (37.2 miles) between stations. This type of network can also run over shielded and unshielded twisted-pair cabling (when it is known as CDDI, or Copper Distributed Data Interface) for shorter distances.
   See also FDDI-II.
   

Dictionary of networking . 2014.

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