[dns-operations] IPv6 & IPv4 addresses

Edward Lewis Ed.Lewis at neustar.biz
Thu Mar 17 16:23:47 UTC 2011

At 15:41 +0000 3/17/11, George Barwood wrote:

>also the NSEC/NSEC3 record that proves the non-existence of the type
>not queried for where it doesn't exist ( this could be routine ).

No - that violates what's in RFC 2308.

5 - Caching Negative Answers
    A negative answer that resulted from a no data error (NODATA) should
    be cached such that it can be retrieved and returned in response to
    another query for the same <QNAME, QTYPE, QCLASS> that resulted in
    the cached negative response.

Edward Lewis             
NeuStar                    You can leave a voice message at +1-571-434-5468

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