Computer Hardware

What is CDDi?

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Wiki User
2009-05-24 09:45:40

For a local area network (LAN), CDDI (Copper Distributed Data

Interface) is a standard for data transmission based on FDDI (Fiber

Distributed Data Interface) that uses shielded twisted-pair (STP)

or unshielded twisted pair (UTP) copper wire instead of fiber optic

lines. CDDI supports a dual-ring capacity of 200 Mbps. CDDI's

maximum distance is up to 200 meters, which is much shorter than

FDDI. CDDI is defined by the American National Standards Committee

X3-T9.5 and conforms to the Open Systems Interconnection (OSI)

model of functional layering. CDDI is officially named the

Twisted-Pair Physical Medium Dependent (TP-PMD) standard and is

also referred to as Twisted Pair Distributed Data Interface

(TP-DDI).


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