RFC 9619 · PROPOSED STANDARD · 2024
MON · 27 JUL 2026
In the DNS, QDCOUNT Is One
Overview
RFC 9619, “In the DNS, QDCOUNT Is One”, is a Proposed Standard document published in July 2024 by R. Bellis, J. Abley. It updates RFC 1035. The canonical text is published by the RFC Editor.
Abstract
This document updates RFC 1035 by constraining the allowed value of the QDCOUNT parameter in DNS messages with OPCODE = 0 (QUERY) to a maximum of one, and it specifies the required behavior when values that are not allowed are encountered.
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
Read this RFC
The canonical text of RFC 9619 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
Relationships to other RFCs
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