A CDE Definition
An IEEE standard for Gigabit Ethernet over optical fiber and shielded twisted pair (STP). It provides for full-duplex transmission from switch to end station or to another switch and half-duplex over a shared channel using the CSMA/CD access method. 802.3ab is the counterpart standard for Gigabit Ethernet over Category 5 copper wiring. See Gigabit Ethernet.
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