RFC 209 · UNKNOWN · 1971
SUN · 14 JUN 2026
Host/IMP interface documentation
Overview
RFC 209, “Host/IMP interface documentation”, is an Unknown document published in August 1971 by B. Cosell. The canonical text is published by the RFC Editor.
What “Unknown” means
The standards-track status of this early RFC was never formally classified.
Read this RFC
The canonical text of RFC 209 is hosted at rfc-editor.org. Available in TXT,HTML.
Other RFCs from 1971
- RFC 208 Address tables
- RFC 210 Improvement of Flow Control
- RFC 207 September Network Working Group meeting
- RFC 211 ARPA Network Mailing Lists
- RFC 206 A User TELNET Description of an Initial Implementation
- RFC 212 NWG meeting on network usage
- RFC 205 NETCRT - a character display protocol
- RFC 213 IMP System change notification