[dns-operations] Signaling client protocol to authority

[Jim Reid]

On 16 Jan 2011, at 17:04, Patrick W. Gilmore wrote:

> It is much better to give back an A record when the user can use a  
> quad-A than handing back a quad-A when the user only has v4.

This is all very well but it's not how the DNS works. Why would a  
server choose to put an A record in the Answer Section when it was  
asked for AAAA (or vice versa)?