What is FDDI?

FDDI is an abbreviation for Fiber Distributed Data Interface and describes a local network structure.

The FDDI standard was developed in the late 1980s and expanded in 1994 as a successor to the old 10Mbit Ethernet. It has a long range and is often used as a central backbone in practice due to its particularly low failure rate. The FDDI network is based on synthetic fiber cables whereas most networks use CDDI (Copper Distributed Data Interface) cabling where the cables are copper based.

One way to increase network throughput is to use backbone technologies that are significantly faster than Ethernet. This is where FDDI is typically used.  

FDDI has a very high data throughput and is therefore preferably used in LANs as a central high-speed backbone. Critical network stations such as database servers can also be integrated directly into the FDDI ring, bypassing the Ethernet bottleneck.

The advantages of FDDI are:

  • A high transfer rate of 100 Mbit per second.
  • A fault tolerance due to a double ring topology.
  • High transmission reliability.
  • Electromagnetic insensitivity when using fiber optic cables as a transmission medium.
  • Can be used for multimedia applications and twisted pair copper cables.