RFC 645 · UNKNOWN · 1974
MON · 15 JUN 2026
Network Standard Data Specification syntax
Overview
RFC 645, “Network Standard Data Specification syntax”, is an Unknown document published in June 1974 by D. Crocker. It obsoletes RFC 615. The canonical text is published by the RFC Editor.
Abstract
Providing a mechanism for specifying all attributes of a collection of bits; see also RFC 615.
What “Unknown” means
The standards-track status of this early RFC was never formally classified.
Read this RFC
The canonical text of RFC 645 is hosted at rfc-editor.org. Available in TXT,PDF,HTML.
Relationships to other RFCs
Other RFCs from 1974
- RFC 644 On the problem of signature authentication for network mail
- RFC 643 Network Debugging Protocol
- RFC 647 Proposed protocol for connecting host computers to ARPA-like networks via front end processors
- RFC 642 Ready line philosophy and implementation
- RFC 640 Revised FTP reply codes
- RFC 651 Revised Telnet status option
- RFC 638 IMP/TIP preventive maintenance schedule
- RFC 652 Telnet output carriage-return disposition option