RFC 516 · UNKNOWN · 1973
SUN · 14 JUN 2026
Lost message detection
Overview
RFC 516, “Lost message detection”, is an Unknown document published in May 1973 by J. Postel. 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 516 is hosted at rfc-editor.org. Available in TXT,HTML.
Other RFCs from 1973
- RFC 515 Specifications for Datalanguage, Version 0/9
- RFC 514 Network make-work
- RFC 518 ARPANET accounts
- RFC 513 Comments on the new Telnet specifications
- RFC 519 Resource Evaluation
- RFC 512 More on lost message detection
- RFC 520 Memo to FTP group: Proposal for File Access Protocol
- RFC 521 Restricted use of IMP DDT