Reviewer: Alexey Melnikov
Review result: Ready

Hi,

I have reviewed this document as part of the security directorate's ongoing
effort to review all IETF documents being processed by the IESG. These
comments were written primarily for the benefit of the security area 
directors.
Document editors and WG chairs should treat these comments just like any 
other
last call comments.

The document is short, well written and has multiple good examples.

The Security Considerations section says that this document clarifies 
correct
DNS server behavior and does not introduce any changes or new security
considerations. I agree with this assessment.


Best Regards,
Alexey