To me this is a feature, possibly the most important feature.
On October 25, 2015 6:16:54 AM GMT+11:00, Stephane Bortzmeyer
<bortzme...@nic.fr> wrote:
>[Re-reading all emails...]
>
>On Fri, Jul 10, 2015 at 11:53:30AM -0700,
> 神明達哉 <jin...@wide.ad.jp> wrote
> a message of 62 lines which said:
>
>> Regarding Section 5 (possible side effect on root servers), I wonder
>> about the implication of qname-minimization (which I expect will be
>> deployed much sooner than this proposal). A resolver that supports
>> qname-minimization would first send a query to "local." to the root
>> server upon receiving a "foo.local" query, and cache the result of
>> NXDOMAIN for "local.". It will suppress subsequent external queries
>> for any subdomain of it.
>
>Yes. Qname minimization relies on the fact that resolvers follow the
>tree structure of the DNS. If "toto." does not exist, it means
>"foobar.toto." certainly does not exist and there is no point querying
>any authoritative server about it, a resolver can send back NXDOMAIN
>immediately.
>
>In ietf-dnsop-qname-minimisation-07, it is discussed in section 3.
>
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