Edge Rewrite
// HTMLRewriter · presentation

This page was redesigned at the edge.

Cloudflare fetched the original article and streamed it through HTMLRewriter to apply an entirely new visual system without rebuilding the source page.

// request.cf · coarse context

A page that knows where it met you.

Only coarse request metadata is shown. This demo does not display or persist visitor IP addresses.

Country
US
Cloudflare location
CMH
Connection
HTTP/2
Language
Not provided

Ray ID: a21ae425ce155c4f

Jump to content

Digital Data Communications Message Protocol

From Wikipedia, the free encyclopedia

Digital Data Communications Message Protocol (DDCMP) is a byte-oriented communications protocol devised by Digital Equipment Corporation in 1974[1] to allow communication over point-to-point network links for the company's DECnet Phase I network protocol suite. The protocol uses full or half duplex synchronous and 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 suite. DDCMP has been described as the "most popular and pervasive of the commercial byte-count data link protocols".[2]

See also

[edit]

References

[edit]
Notes
  1. Gurdeep S. Hura; Mukesh Singhal (28 March 2001). Data and Computer Communications: Networking and Internetworking. CRC Press. p. 483. ISBN 978-0-8493-0928-1. Digital Equipment Corporation (DEC) developed a byte-oriented protocol known as digital data communications message protocol (DDCMP) in 1974.
  2. Barksdale, William J. (13 March 2013). Practical Computer Data Communications. Springer Science & Business Media. p. 185. ISBN 978-1-4684-5164-1. DEC Digital Data Communications Message Protocol (DDCMP)... is the most popular and pervasive of the commercial byte-count data link protocols.