Cited in: RFC 491
2 RFCs mentioned in the text of RFC 491 (What is "Free"?)
| RFC | Title | Status | Date |
|---|---|---|---|
| 451 | Tentative proposal for a Unified User Level Protocol | Unknown | February 1973 |
| 475 | FTP and Network Mail System | Unknown | March 1973 |
2 RFCs mentioned in the text of RFC 491 (What is "Free"?)
| RFC | Title | Status | Date |
|---|---|---|---|
| 451 | Tentative proposal for a Unified User Level Protocol | Unknown | February 1973 |
| 475 | FTP and Network Mail System | Unknown | March 1973 |