RFC 431 · UNKNOWN · 1972
MON · 15 JUN 2026
Update on SMFS Login and Logout
Overview
RFC 431, “Update on SMFS Login and Logout”, is an Unknown document published in December 1972 by M. Krilanovich. It updates RFC 122. It obsoletes RFC 399. 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 431 is hosted at rfc-editor.org. Available in TXT,HTML.
Relationships to other RFCs
Other RFCs from 1972
- RFC 432 Network logical map
- RFC 429 Character Generator Process
- RFC 433 Socket number list
- RFC 425 "But my NCP costs $500 a day"
- RFC 423 UCLA Campus Computing Network Liaison Staff for ARPANET
- RFC 422 Traffic statistics
- RFC 421 Software Consulting Service for Network Users
- RFC 419 To: Network liaisons and station agents