More on CNAME problem

[Edsonet]

The problem with excessive CNAME requests went on for about 2 weeks, and
then stopped as quickly as it started. The requests were from 3 IP
addresses, but predominantly from the one below. I have been in contact
with the site, but they have no idea what was happening.

Then I noticed something peculiar about all the requests. There is no
request for an "A" record, just a request for a "CNAME" record. Is this
normal practice?

J.A. Coutts
Systems Engineer
Edsonet/TravPro
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09:34:44   Request from 199.117.52.11 for CNAME-record for yellowhead.com.
09:34:44   Sending reply to 199.117.52.11 about CNAME-record for
yellowhead.com.:
09:34:44   -> Answer: There are no CNAME-Records for yellowhead.com.
09:34:44   -> Authority: SOA-record for yellowhead.com. =
server1.yellowhead.com. (Serial 2000031302)
09:34:44   Request from 199.117.52.11 for CNAME-record for yellowhead.com.
09:34:44   Sending reply to 199.117.52.11 about CNAME-record for
yellowhead.com.:
09:34:44   -> Answer: There are no CNAME-Records for yellowhead.com.
09:34:44   -> Authority: SOA-record for yellowhead.com. =
server1.yellowhead.com. (Serial 2000031302)
09:34:45   Request from 199.117.52.11 for MX-record for yellowhead.com.
09:34:45   Sending reply to 199.117.52.11 about MX-record for yellowhead.com.:
09:34:45   -> Answer: MX-record for yellowhead.com. = mail.yellowhead.com.
(Preference 100)
09:34:45   -> Additional: A-record for mail.yellowhead.com. = 207.34.82.5
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