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'''Digital Data Communications Message Protocol''' ('''DDCMP''') is a [[byte-oriented protocol|byte-oriented]] [[communications protocol]] devised by [[Digital Equipment Corporation]] in 1974 to allow communication over [[Network_topology#Point-to-point|point-to-point]] network links for the company's [[DECnet]] Phase I network protocol. The protocol uses full or half [[Duplex (telecommunications)|duplex]] [[Synchronization|synchronous]] and [[Asynchronous communication|asynchronous]] links and allowed errors introduced in transmission to be detected and corrected. It was retained and extended for later versions of the DECnet protocol.
== References ==
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