틀:Ref RFC/db/4
| RFC | Status | Reference | Notes |
|---|---|---|---|
| 435 | Unknown | B. Cosell; D. Walden (5 January 1973). TELNET Issues. Network Working Group. RFC 435. https://tools.ietf.org/html/rfc435. | NIC 13675. |
| 495 | Unknown | A. McKenzie (1 May 1973). TELNET Protocol Specification. Network Working Group. RFC 495. https://tools.ietf.org/html/rfc495. | NIC 15371. Updated by RFC 562. |