On 08/11/2018 11:47, Dan York wrote:
For that reason, wouldn't all the resolvers (or at least an extremely high %)
need to be upgraded to support the new record?
They don't _have_ to be, but performance is improved when they are
(since only an upgraded resolver will include the A and AAAA answers in
the additional section).
The critical path is the browsers, since none of this works unless they
start looking up the HTTP record.
As a transition mechanism, site operators would still need to publish
their existing A and AAAA records by whatever means they currently do
(even if that's e.g. a CNAME flattening on the authority server).
Ray
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