[dns-operations] Signaling client protocol to authority

[Andrew Sullivan]

On Sun, Jan 16, 2011 at 12:04:14PM -0500, 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.
> 
> Put another way, the failure mode one way is, frankly, boring.  The failure mode the other way is disastrous.

It's only boring today, no?

At some point in the not too distant future, the failure mode for not
getting a AAAA will be greater, because there will be people who don't
have an IPv4 address.  Initially, there will be very few, but if any
of the economics literature on commodity scarcity in the face of
alternatives tells us anything (and there's reason to be sceptical),
it's that when the old commodity starts getting replaced, it happens
very quickly. 

A

-- 
Andrew Sullivan
ajs at shinkuro.com
Shinkuro, Inc.