General DNS questions

[Mark.Andrews at nominum.com]

> I hope this won't be considered too newbie.  
> 
> q1: Can a dns plain host's resolver (not  a name server) ask for an
> iterative query at all or does it ALWAYS count on the server to do it?
> How wide is the usage of such hosts in the real world? 

	Full service resolvers are uncommon.

> 
> q2: A name server is supposed to track down an answer itself and not be askin
> g
> other name servers recursive queries. Is it applicable to define a name
> server as non-recursive for hosts (and name servers) located outside the
> autonomous system? 

	Yes, this is done all the time.

> 
> q3: When will a resolver ask for more then one query in the same packet? 

	In general never.  The error space is not well defined.

> 
> Many thanks,
> Hank
> 
--
Mark Andrews, Nominum Inc.
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark.Andrews at nominum.com