FDDI is a group of networking specifications called standardized by ANSI in the mid-1980s.

The full form of FDDI is ” Fiber Distributed Data Interface .” An FDDI network supports data transfer speeds of up to 100 Mbps in a fiber optic cable and uses a rotating token that defines which system will send data at a particular time.

FDDI networks include two physical paths, or “rings,” that transfer data in reverse directions. Where the primary ring carries data between systems, the secondary ring is used for redundancy.

If a system causes an interruption in the network in the primary data path, then the secondary ring is used until the primary ring is functional again.

A variation of FDDI, also called FDDI Full Duplex Technology (FFDT), uses the secondary ring as an additional primary channel. There is no redundancy of this type of FDDI network, but it supports data transfer rates up to 200 Mbps.

The FDDI was designed in the 1980s. It was primarily designed to provide faster networking. At the same time it was built to provide better networking than 10 Mbps Ethernet and 16 Mbps token ring standards.

Since it has high bandwidth , FDDI soon became a popular choice among universities and businesses to use high-speed backbones.

While FDDI was once the world’s fastest LAN technology for many years, it was later superseded by Fast Ethernet. Which used to offer 100 Mbps speeds at a much lower cost.

In today’s time, many networks use Gigabit Ethernet, which supports speeds up to 1,000 Mbps.

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