DNS packet size question.

[Barry Margolin]

In article <NEBBJBHKIKIHCFMHBCIPEEDPCAAA.john at nameengine.com>,
John Banas <john at nameengine.com> wrote:
>
>We are trying to figure out how to estimate how many hits 10.461MB of DNS
>bandwidth that our firewall is telling us that we had in 3 hrs.
>
>What is the normal DNS packet size for a query and a response?

Queries are around 20 bytes (not including the lower-layer headers).  The
response size depends on what you're looking up and whether the server
includes authority records in the responses; if you use "dig" to perform
some queries it will show the response size.

-- 
Barry Margolin, barmar at genuity.net
Genuity, Burlington, MA
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