[sdnog] DNS Queries

[Mujahid Abdellatif]

All of DNS traffic is UDP but when the Secondary DNS replicates the zones of the Primary DNS, the connection is TCP so not to lose packets cause the process of zone transferring is critical and all zones must be transferred to the secondary DNS.
Recursive DNS is kind of the opposite of standard dns which is an authoritative DNS service that allows others to find your domain while Recursive DNS allows you to resolve other people's domains.


Mujahid Abdellatif Salih
IP Network Engineer
MaxNet-Sudan
mujahidjunior at hotmail.com<http://mujahidjunior@hotmail.com>
<http://goog_2066336015/>



________________________________
From: sdnog-bounces at sdnog.sd <sdnog-bounces at sdnog.sd> on behalf of wadah khalid <engwada7 at gmail.com>
Sent: Monday, August 22, 2016 4:36 AM
To: sdnog at sdnog.sd
Subject: [sdnog] DNS Queries

thank you for your response ..
as i know DNS has two operation queries  - (1)recursive query which is the operation between the client and server and (2) iterative query which represents the relation between my server and other DNS servers .
i think the recursive is tcp rather than the iterative which is udp ...
what do you think
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