[sdnog] DNS Queries

[wadah khalid]

The IETF RFC 5966 says that :
Most of DNS operations are UDP
Recursive server (or forwarder) implementations MUST support TCP
      so that they do not prevent large responses from a TCP-capable
      server from reaching its TCP-capable clients.
بتاريخ ٢٢‏/٠٨‏/٢٠١٦ ٣:١٤ م، جاء من "Philip Paeps" <philip at trouble.is>:

> On 2016-08-22 13:36:35 (+0200), wadah khalid <engwada7 at gmail.com> wrote:
>
> > 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 . *
>
> Both of those queries are identical.
>
> > *i think the recursive is tcp rather than the iterative which is udp ...*
> > *what do you think*
>
> You think wrong.  I would recommend reading section 4.2 of RFC 1035 again.
>
> Philip
>
> --
> Philip Paeps
> Senior Reality Engineer
> Ministry of Information
>
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