Re: [dns-operations] root? we don't need no stinkin' root!

Tue, 26 Nov 2019 02:43:04 -0800 


> On 26 Nov 2019, at 09:16, Florian Weimer <[email protected]> wrote:
> 
> Up until recently, well-behaved recursive resolvers had to forward
> queries to the root if they were not already covered by a delegation.
> RFC 7816 and in particular RFC 8198 changed that, but before that, it
> was just how the protocol was expected to work.

So what? These RFCs make very little difference to the volume of queries a 
resolving server will send to the root. QNAME minimisation has no impact at 
all: the root just sees a query for .com instead of foobar.com. A recursive 
resolver should already be supporting negative caching and will have a 
reasonably complete picture of what's in (or not in) the root. RFC8198 will of 
course help that but not by much IMO.



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