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Re:What came first: the CNAME or the A record? by inopinatus on Monday January 19, 2026 @02:37PM (#46683457)
The article makes it very clear that the ambiguity arises in another phrase: “difference in ordering of the RRs in the answer section is not significant”, which is applied to an example; the problem with examples being that they are illustrative, viz. generalisable, and thus may permit order ambiguity everywhere, and in any case, whether they should or shouldn’t becomes a matter of pragmatic context.

Which goes to show, one person’s “obvious understanding” is another’s “did they even read the entire document”.

All of which also serves to highlight the value of normative language, but that came later.

Re:What came first: the CNAME or the A record? by PunchyHamster on Monday January 19, 2026 @07:48PM (#46686572)
it wouldn't be a problem if they tested it properly... especially WHEN stuff is ambigous
Re:What came first: the CNAME or the A record? by nraynaud on Tuesday January 20, 2026 @02:34AM (#46688967)
They may not have realized their interpretation is ambiguous until after the incident, that’s the kind of stuff you realize after you find a bug and do a deep dive in the literature for a post mortem. They probably worked with the certitude that record order is irrelevant until that point.