Need info about dns client

[RAGHAVENDRA SADARAMACHANDRA]

Hi All,

 I am newbie to dns. Need info about following.

 1. Recursive Query
 2. Iterative Query
 3. Full Resolver
 4. Stub Resolver
 5. How about using broadcast and multicast feature in dns client

 I observed that there is one flag in dns packet to indicate whether recursion is desired or not? Is it sufficient to set/reset this flag to indicate recursive/iterative(non-recursive) query or I need to do more?

 Thanx in advance.

-Raghu.From spoo at isc.org  Tue Nov 20 03:07:59 2007
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Date: Tue, 20 Nov 2007 04:07:47 +0100
From: "Marco Michelino" <michelinux at gmail.com>
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Subject: Change nameserver's ips
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Hi all,
I need to move some domains from two old nameserver to new nameservers
with different ip addresses; I would like to do this without changing
delegation... is it possible?

Say ns1.mydomain.com and ns2.mydomain.com are authoritative for
mydomain.com, I need to change ip addresses for ns3.mydomain.com and
ns4.mydomain.com while ns1 and ns2 remains unchanged

If I copy all zone files to new servers and edit ns3 and ns4 A records
in mydomain.com zone file will somethig go wrong?