From the mentioned specification:
> TCP implementations should follow a general principle of robustness: be conservative in what you do, be liberal in what you accept from others.
Better to look in the sources ;)
> TCP implementations should follow a general principle of robustness: be conservative in what you do, be liberal in what you accept from others.
Better to look in the sources ;)
> The principle is also known as Postel's law, after Jon Postel, who used the wording in an early specification of TCP.