High-level Data Link Control


High-level Data Link Control

(networking)(HDLC) A general-purpose data link controlprotocol defined by ISO for use on both point-to-point andmultipoint (multidrop) data links. It supportsfull-duplex, transparent-mode operation. It is usedextensively in both multipoint and computer networks.

Some manufacturers and other standards bodies still use theirown acronyms, e.g. IBM's SDLC (Synchronous Data Link Control), the forerunner of HDLC and ANSI's ADCCP(Advanced Data Communications Control Procedure).

[Fred Halsall, "Data Communications, Computer Networks andOpen Systems" 4th edition, 1996, p.237, Addison-WesleyPublishing Co. Reading, Mass., USA].