| 8166 | Remote Direct Memory Access Transport for Remote Procedure Call Version 1C. Lever, Ed., W. Simpson, T. Talpey | Proposed Standard | June 2017 |
| 6013 | TCP Cookie Transactions (TCPCT)W. Simpson · obsoleted by RFC 7805 | Historic | January 2011 |
| 4861 | Neighbor Discovery for IP version 6 (IPv6)T. Narten, E. Nordmark, W. Simpson, H. Soliman | Draft Standard | September 2007 |
| 4419 | Diffie-Hellman Group Exchange for the Secure Shell (SSH) Transport Layer ProtocolM. Friedl, N. Provos, W. Simpson | Proposed Standard | March 2006 |
| 2865 | Remote Authentication Dial In User Service (RADIUS)C. Rigney, S. Willens, A. Rubens, W. Simpson | Draft Standard | June 2000 |
| 2841 | IP Authentication using Keyed SHA1 with Interleaved Padding (IP-MAC)P. Metzger, W. Simpson | Historic | November 2000 |
| 2615 | PPP over SONET/SDHA. Malis, W. Simpson | Proposed Standard | June 1999 |
| 2523 | Photuris: Extended Schemes and AttributesP. Karn, W. Simpson | Experimental | March 1999 |
| 2522 | Photuris: Session-Key Management ProtocolP. Karn, W. Simpson | Experimental | March 1999 |
| 2521 | ICMP Security Failures MessagesP. Karn, W. Simpson | Experimental | March 1999 |
| 2461 | Neighbor Discovery for IP Version 6 (IPv6)T. Narten, E. Nordmark, W. Simpson · obsoleted by RFC 4861 | Draft Standard | December 1998 |
| 2153 | PPP Vendor ExtensionsW. Simpson | Informational | May 1997 |
| 2138 | Remote Authentication Dial In User Service (RADIUS)C. Rigney, A. Rubens, W. Simpson, S. Willens · obsoleted by RFC 2865 | Proposed Standard | April 1997 |
| 2058 | Remote Authentication Dial In User Service (RADIUS)C. Rigney, A. Rubens, W. Simpson, S. Willens · obsoleted by RFC 2138 | Proposed Standard | January 1997 |
| 1994 | PPP Challenge Handshake Authentication Protocol (CHAP)W. Simpson | Draft Standard | August 1996 |
| 1993 | PPP Gandalf FZA Compression ProtocolA. Barbir, D. Carr, W. Simpson | Informational | August 1996 |
| 1989 | PPP Link Quality MonitoringW. Simpson | Draft Standard | August 1996 |
| 1974 | PPP Stac LZS Compression ProtocolR. Friend, W. Simpson | Informational | August 1996 |
| 1973 | PPP in Frame RelayW. Simpson | Proposed Standard | June 1996 |
| 1970 | Neighbor Discovery for IP Version 6 (IPv6)T. Narten, E. Nordmark, W. Simpson · obsoleted by RFC 2461 | Proposed Standard | August 1996 |
| 1853 | IP in IP TunnelingW. Simpson | Informational | October 1995 |
| 1852 | IP Authentication using Keyed SHAP. Metzger, W. Simpson · obsoleted by RFC 2841 | Experimental | September 1995 |
| 1851 | The ESP Triple DES TransformP. Karn, P. Metzger, W. Simpson | Experimental | September 1995 |
| 1829 | The ESP DES-CBC TransformP. Karn, P. Metzger, W. Simpson | Proposed Standard | August 1995 |
| 1828 | IP Authentication using Keyed MD5P. Metzger, W. Simpson | Historic | August 1995 |
| 1788 | ICMP Domain Name MessagesW. Simpson · obsoleted by RFC 6918 | Historic | April 1995 |
| 1688 | IPng Mobility ConsiderationsW. Simpson | Informational | August 1994 |
| 1662 | PPP in HDLC-like FramingW. Simpson, Ed. | Internet Standard | July 1994 |
| 1661 | The Point-to-Point Protocol (PPP)W. Simpson, Ed. | Internet Standard | July 1994 |
| 1619 | PPP over SONET/SDHW. Simpson · obsoleted by RFC 2615 | Proposed Standard | May 1994 |
| 1618 | PPP over ISDNW. Simpson | Proposed Standard | May 1994 |
| 1598 | PPP in X.25W. Simpson | Proposed Standard | March 1994 |
| 1570 | PPP LCP ExtensionsW. Simpson, Ed. | Proposed Standard | January 1994 |
| 1552 | The PPP Internetworking Packet Exchange Control Protocol (IPXCP)W. Simpson | Historic | December 1993 |
| 1549 | PPP in HDLC FramingW. Simpson, Ed. · obsoleted by RFC 1662 | Draft Standard | December 1993 |
| 1548 | The Point-to-Point Protocol (PPP)W. Simpson · obsoleted by RFC 1661 | Draft Standard | December 1993 |
| 1334 | PPP Authentication ProtocolsB. Lloyd, W. Simpson · obsoleted by RFC 1994 | Proposed Standard | October 1992 |
| 1333 | PPP Link Quality MonitoringW. Simpson · obsoleted by RFC 1989 | Proposed Standard | May 1992 |
| 1331 | The Point-to-Point Protocol (PPP) for the Transmission of Multi-protocol Datagrams over Point-to-Point LinksW. Simpson · obsoleted by RFC 1548 | Proposed Standard | May 1992 |