On Sep 7, 2023, at 19:28, Mark Andrews <ma...@isc.org> wrote:
> 
> 
> 
> The server shouldn’t be caching the RRset and it’s RRSIGs unless they validate
> successfully.  This is a requirement of DNSSEC.  This is also why recursive
> servers need to validate responses so that garbage is not cached.

Ah, so just the QNAME is remembered in the negative cache ? And the TTL of 
RRSIG is irrelevant because the record was thrown away. I understand now.

Thanks for the clarification. Perhaps this clarification would be useful for 
the document ?

Paul
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