Minimized DNS Resolution: Into the Penumbra

[Future Sensors]

Minimized DNS Resolution: Into the Penumbra

Burton S. Kaliski Jr., Verisign

Internet Protocol Journal - IPJ
Vol. 25, No. 3, December 2022

Abstract

The Domain Name System (DNS) has long followed a traditional approach of answering queries, where resolvers send a query with the same fully qualified domain name to each name server in a chain of referrals, and, generally, apply the final answer they receive only to the domain name that was queried for.​

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Motivated by interest in reducing both the quantity and sensitivity of information exchanged between DNS ecosystem components, DNS operators are now starting to deploy various minimization techniques that either put less information into queries or take more information out of answers, thereby reducing the need for additional queries.​

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This article reviews four minimization techniques documented by the Internet Engineering Task Force (IETF), reports on their implementation status, and discusses the effects of their adoption on DNS measurement research.​

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