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TCP implementations will follow a general principle of robustness: be conservative in what you do, be liberal in what you accept from others.

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More quotes by Jon Postel

Of course, there isn’t any "God of the Internet." The Internet works because a lot of people cooperate to do things together.

In general, an implementation must be conservative in its sending behavior, and liberal in its receiving behavior.

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Quote text and notes from Wikiquote: Jon Postel (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.