High-level Data Link Control

networking (HDLC) A general-purpose data link control

protocol defined by ISO for use on both point-to-point and

multipoint (multidrop) data links. It supports

full-duplex, transparent-mode operation. It is used

extensively in both multipoint and computer networks.

Some manufacturers and other standards bodies still use their

own acronyms, e.g. IBM's SDLC (Synchronous Data LinkControl), the forerunner of HDLC and ANSI's ADCCP

(Advanced Data Communications Control Procedure).

[Fred Halsall, "Data Communications, Computer Networks and

Open Systems" 4th edition, 1996, p.237, Addison-Wesley

Publishing Co. Reading, Mass., USA].

(1997-11-09)