Synchronous Data Link Control (SDLC)

Synchronous Data Link Control, also known as SDLC, is a protocol that can be used for talking between computers or between computer and a remote device.

It’s very simple, but it’s also very robust. It’s well defined and there is no way that the receiver can misinterpret the meaning of the bits within the message.

Each message is actually called the frame and it begins with a special character called the flag followed by the data followed by another flag.

Watch I/O in a Minute:Synchronous Data Link Control (SDLC)
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