dig query

[Jeremy C. Reed]

On Wed, 6 Jan 2010, Michael Sinatra wrote:

> I tried this out and I noticed that both BIND and unbound appear to 
> behave the same way when using dig in this manner.  So both of the 
> major validating implementations support it.  I don't see specific 
> reference to using the AD flag in queries in the RFCs (at least on a 
> cursory glance), but it's a very useful feature.

See bottom of 4.7 in 
http://tools.ietf.org/html/draft-ietf-dnsext-dnssec-bis-updates-09
about using AD in query.