RFC 42 · UNKNOWN · 1970
MON · 14 SEP 2026
Message Data Types
Overview
RFC 42, “Message Data Types”, is an Unknown document published in March 1970 by E. Ancona. 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 42 is hosted at rfc-editor.org. Available in TXT,HTML.
Other RFCs from 1970
- RFC 41 IMP-IMP Teletype Communication
- RFC 43 Proposed Meeting
- RFC 40 More Comments on the Forthcoming Protocol
- RFC 44 Comments on NWG/RFC 33 and 36
- RFC 39 Comments on Protocol Re: NWG/RFC #36
- RFC 45 New Protocol is Coming
- RFC 38 Comments on Network Protocol from NWG/RFC #36
- RFC 46 ARPA Network protocol notes