Key words for use in RFCs to Indicate Requirement Level
| 1. MUST |
| 2. MUST NOT |
| 3. SHOULD |
| 4. SHOULD NOT |
| 5. MAY |
| 6. Guidance in the use of these Imperatives |
| 7. Security Considerations |
| 8. Acknowledgments |
| 9. Author's Address |
|
RFC 2119:Key words for use in RFCs to Indicate Req...
|
| RFC-Ref |

| 1. MUST |
| 2. MUST NOT |
| 3. SHOULD |
| 4. SHOULD NOT |
| 5. MAY |
| 6. Guidance in the use of these Imperatives |
| 7. Security Considerations |
| 8. Acknowledgments |
| 9. Author's Address |