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FDDI Standards For High Speed LANs

The American National Standards Institute (ANSI) is close to approving a new standard known as Fibre Distributed Data Interface (FDDI). This is a high speed optical communications network based on a packet switching mode of operation. More recently, work has started on a companion standard known as FDDI-II, designed to support both circuit switching and packet switching modes of operation. This paper describes the important features of FDDI and FDDI-II, discusses their operation and implementation and presents some possible applications.