DNS packet size question.

[Eric A. Hall]

> What is the normal DNS packet size for a query and a response?

There is no "normal" size. The minimum size of a DNS message that only
has headers (no questions, answers or anything else) is 96 bytes. The
size of the question, answer, authority and additional data sections
will vary tremendously depending upon the type of data being queried (A
vs PTR vs "*") and how/where the question gets processed.

-- 
Eric A. Hall                                      http://www.ehsco.com/
Internet Core Protocols        http://www.oreilly.com/catalog/coreprot/