contacting a external nameserver

Tue Jan 27 10:15:24 UTC 2009

Hi all,
I'm having a question related to querying external servers that hope you
could answer me. I'm sending a iterative query for an external server and
the server is sending a referral answer but only with the authoritive name
servers.  After that, i send a query A asking the nameservers ip addresses.
This A query is supposed to be a recursive query or must be a iterative one?
Is there a standard that talks about this? thanks in advance.

Kind regards,
Luis
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