Synchronous Data Link Control

Synchronous Data Link Control ( SDLC) ( Synchronous Data Link Control ) is a vendor-specific bitsynchrones data communication protocol for the transparent bit-serial data transfer. It covers two layer developed by IBM SNA. The data can be exchanged over dedicated lines or switched lines in the modes half or full duplex. The transmission path may be configured as point-to- point connection or a multipoint connection loop.

SDLC provides the basis for the extended HDLC protocol, which has an extended frame ( frame). Just as with HDLC so-called stuff bits are used for channel coding even with SDLC.

In SDLC messages in short frame (frames) are divided with a uniform format and transmitted. SDLC has as distinctive feature to the older byte- oriented network protocol BSC a uniformly formatted frame construction.

  • Network protocol (data link layer )
  • Telecommunications
  • IBM
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