Ports

[phn at icke-reklam.ipsec.nu]

Genco YILMAZ <gyilmaz at mw.net.tr> wrote:
> Hi Stephane,
> thanks for your helpful information but I wonder something.
> Most resolvers prefer using UDP as their transport layer protocol right ?
> Do you know which resolvers use TCP for queries ?
> or How can we know that our resolver use tcp or udp ?

You cannot know.  At sometime someone "out there" detects packets losses
and decides to retry with TCP.   
Alternativly, someday some of your RR get's to large and gets truncated
in a non-edns0 transaction, thus retry with TCP is attempted.




-- 
Peter Håkanson         
        IPSec  Sverige      ( At Gothenburg Riverside )
           Sorry about my e-mail address, but i'm trying to keep spam out,
	   remove "icke-reklam" if you feel for mailing me. Thanx.