Technical Summary
This memo describes DNS iterative resolver behavior that results in a
significant query volume sent to the root and top-level domain (TLD)
name servers, and offers implementation advice to iterative resolver
developers to alleviate these unnecessary queries. The
recommendations made in this document are a direct byproduct of
observation and analysis of abnormal query traffic patterns seen at
two of the thirteen root name servers and all thirteen com/net TLD
name servers.
Working Group Summary
This document was produced by the DNSOP WG. The WG has consensus
to publish this document as a BCP.
Protocol Quality
This document has been reviewed for the IESG by David Kessens.