about tcp port 53

[Fr34k]

Hello,

Doing a search on this at www.google.com offers this first link:

http://www.tcpipguide.com/free/t_DNSMessageGenerationandTransport-2.htm

HTH



----- Original Message ----
From: Tech W. <techwww at yahoo.com.cn>
To: Stephane Bortzmeyer <bortzmeyer at nic.fr>
Cc: bind-users at lists.isc.org
Sent: Wednesday, July 29, 2009 12:35:31 AM
Subject: Re: about tcp port 53






--- On Tue, 28/7/09, Stephane Bortzmeyer <bortzmeyer at nic.fr> wrote:

> 
> > what's the use of bind's tcp port 53?
> 
> DNS requests and responses.
> 

oh, I was always thinking dns requests and responses are going with udp protocal. under what condition it uses tcp protocal?


Regards,
Wah.


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