RFC 611 · UNKNOWN · 1974
WED · 17 JUN 2026
Two changes to the IMP/Host Protocol to improve user/network communications
Overview
RFC 611, “Two changes to the IMP/Host Protocol to improve user/network communications”, is an Unknown document published in February 1974 by D.C. Walden. The canonical text is published by the RFC Editor.
Abstract
Expansion of Host-Going-Down and addition of Dead-Host-Status Message.
What “Unknown” means
The standards-track status of this early RFC was never formally classified.
Read this RFC
The canonical text of RFC 611 is hosted at rfc-editor.org. Available in TXT,HTML.
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- RFC 613 Network connectivity: A response to RFC 603
- RFC 608 Host names on-line
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- RFC 607 Comments on the File Transfer Protocol
- RFC 615 Proposed Network Standard Data Pathname syntax
- RFC 617 Note on socket number assignment