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DNS problems to RoadRunner - tcp vs udp
- Subject: DNS problems to RoadRunner - tcp vs udp
- From: Valdis.Kletnieks at vt.edu (Valdis.Kletnieks at vt.edu)
- Date: Fri, 13 Jun 2008 14:19:09 -0400
- In-reply-to: Your message of "Fri, 13 Jun 2008 14:14:55 EDT." <[email protected]>
- References: <[email protected]> <[email protected]>
On Fri, 13 Jun 2008 14:14:55 EDT, Jon Kibler said:
> UDP is used for queries.
>
> TCP is used for zone transfers.
It's also sometimes used if a reply doesn't fit in the 512 bytes for a
UDP answer and EDNS0 isn't in effect. You get a truncated UDP packet back
and re-ask the query over TCP.
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