RFC 9401 · INFORMATIONAL · 2023
WED · 29 JUL 2026
The Addition of the Death Flag to TCP
Overview
RFC 9401, “The Addition of the Death Flag to TCP”, is an Informational document published in April 2023 by S. Toyosawa. The canonical text is published by the RFC Editor.
Abstract
This memo specifies the incorporation of Death (DTH) flag to TCP, including DTH's use of one bit in the TCP header. The flag is designed to make TCP session narratives smooth and attractive.
What “Informational” means
Published for the general information of the community. It does not define an IETF standard and carries no standards-track status.
Read this RFC
The canonical text of RFC 9401 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
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