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--></style><title>Re: [dns-operations] IPv6 & IPv4
addresses</title></head><body>
<div>At 15:41 +0000 3/17/11, George Barwood wrote:</div>
<div><br></div>
<div>>also the NSEC/NSEC3 record that proves the non-existence of
the type</div>
<div>>not queried for where it doesn't exist ( this could be
routine ).</div>
<div><br></div>
<div>No - that violates what's in RFC 2308. </div>
<div><br></div>
<div>5 - Caching Negative Answers</div>
<div>...</div>
<div> A negative answer that resulted from a no data error
(NODATA) should<br>
be cached such that it can be retrieved and returned in
response to<br>
another query for the same <QNAME, QTYPE, QCLASS>
that resulted in<br>
the cached negative response.<br>
</div>
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</pre></x-sigsep>
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