Internet & networking · 1997
RFC 2119: Key words for use in RFCs to Indicate Requirement Levels
Request for Comments 2119 · BCP 14 · Best Current Practice · March 1997
The Best Current Practice that defines MUST, SHOULD, MAY and related key words for requirement levels in specifications.
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- A3
- License
- Distribution unlimited
- Source
- rfc-editor.org
- Retrieved
- 27 September 2026
- Language
- English
- Rights holder
- Scott Bradner, 1997
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RFC Editor plain-text edition, complete. The heading block and the status of the memo are set as the header of the poster; page headers and footers are left out; the misspelling “retransmisssions” of the original is kept.
Rights
Distribution of this memo is unlimited.
RFC 2119 itself carries no copyright notice. The RFC Editor also states: “All RFCs may be freely reproduced and translated (unmodified).” (https://www.rfc-editor.org/faq/)
