DDCMP

views updated May 11 2018

DDCMP Abbrev. for digital data communication message protocol. A data link control protocol developed by Digital Equipment Corporation. It is similar to SDLC and HDLC but is character-oriented rather than bit-oriented. It allows a variety of data link characteristics: full duplex or half duplex, asynchronous or synchronous, switched or dedicated, point-to-point or multipoint, and serial or parallel. Data transparency is achieved using a data-length field rather than bit or byte stuffing techniques. Active NAKs are used for error control, in addition to timeouts.

DDCMP

views updated May 17 2018

DDCMP digital data communication message protocol

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