S
Synchronous Data Link Control (SDLC)
Definition
(Context: General)
An IBM/SNA communications protocol. HDLC, high-level data link control was derived using SDLC. SDLC manages synchronous (i.e., uses timing bit), code-transparent, bit-serial communication which can be duplex or half-duplex; switched or non-switched; point-to- point, multipoint, or loop.