On 2013-08-26, at 22:28, S Moonesamy <sm+ietf(_at_)elandsys(_dot_)com> wrote:
The permitted size of the UDP packet is NOT 512 octets. That is the
permitted size of the DNS Message. DNS Message is not the same thing as a
UDP packet.
Per RFC1035
Section 2.3.4. Size limits
UDP messages 512 octets or less
I'll suggest UDP message.
The consistent word for this in 1035 is simply "message". "DNS Message" is in
more common use today, I would say.
The text you quoted from 1035 is most usefully interpreted as a contraction of
"messages sent over UDP"; "UDP message" really doesn't have a well-understood
meaning, and is easily conflated with "UDP datagram" which does not have a size
limitation of 512 bytes.
Joe