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Internetworking Technologies Handbook, Fourth Edition by Cisco Systems, Inc.

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Chapter 16. Synchronous Data Link Control and Derivatives

Objectives

  • Describe the history of SDLC.

  • Describe the types and topologies of SDLC.

  • Describe the frame format of SDLC.

  • Describe derivative protocols of SDLC.

Introduction

IBM developed the Synchronous Data Link Control (SDLC) protocol in the mid-1970s for use in Systems Network Architecture (SNA) environments. SDLC was the first link layer protocol based on synchronous, bit-oriented operation. This chapter provides a summary of SDLC's basic operational characteristics and outlines several derivative protocols.

After developing SDLC, IBM submitted it to various standards committees. The International Organization for Standardization (ISO) modified SDLC to create the High-Level Data Link Control ...

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