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1. Short for synchronous data link control, SDLC is a data transmission protocol developed by IBM in the 1970s that's used by networks utilizing SNA (Systems Network Architecture).
2. Also called the waterfall model or software development life cycle, SDLC is short for systems development life cycle. It is a set of steps taken from the beginning to the end of a development.
The number of steps in the SDLC varies, depending on the person or organization using it. More commonly, the SDLC consists of five or six steps. The first five steps are similar, if not the same. The sixth step is recognized by some people as part of the SDLC, while others do not.
While the name of each step may vary, the five or six steps of the SDLC are often the following.
