| 792 | Internet Control Message ProtocolJ. Postel | Internet Standard | September 1981 |
| 793 | Transmission Control ProtocolJ. Postel · obsoleted by RFC 9293 | Internet Standard | September 1981 |
| 1122 | Requirements for Internet Hosts - Communication LayersR. Braden, Ed. | Internet Standard | October 1989 |
| 1144 | Compressing TCP/IP Headers for Low-Speed Serial LinksV. Jacobson | Proposed Standard | February 1990 |
| 1323 | TCP Extensions for High PerformanceV. Jacobson, R. Braden, D. Borman · obsoleted by RFC 7323 | Proposed Standard | May 1992 |
| 1958 | Architectural Principles of the InternetB. Carpenter, Ed. | Informational | June 1996 |
| 2018 | TCP Selective Acknowledgment OptionsM. Mathis, J. Mahdavi, S. Floyd, A. Romanow | Proposed Standard | October 1996 |
| 2151 | A Primer On Internet and TCP/IP Tools and UtilitiesG. Kessler, S. Shepard | Informational | June 1997 |
| 2246 | The TLS Protocol Version 1.0T. Dierks, C. Allen · obsoleted by RFC 4346 | Historic | January 1999 |
| 2393 | IP Payload Compression Protocol (IPComp)A. Shacham, R. Monsour, R. Pereira, M. Thomas · obsoleted by RFC 3173 | Proposed Standard | December 1998 |
| 2401 | Security Architecture for the Internet ProtocolS. Kent, R. Atkinson · obsoleted by RFC 4301 | Proposed Standard | November 1998 |
| 2475 | An Architecture for Differentiated ServicesS. Blake, D. Black, M. Carlson, E. Davies, Z. Wang, W. Weiss | Informational | December 1998 |
| 2488 | Enhancing TCP Over Satellite Channels using Standard MechanismsM. Allman, D. Glover, L. Sanchez | Best Current Practice | January 1999 |
| 2507 | IP Header CompressionM. Degermark, B. Nordgren, S. Pink | Proposed Standard | February 1999 |
| 2508 | Compressing IP/UDP/RTP Headers for Low-Speed Serial LinksS. Casner, V. Jacobson | Proposed Standard | February 1999 |
| 2509 | IP Header Compression over PPPM. Engan, S. Casner, C. Bormann · obsoleted by RFC 3544 | Proposed Standard | February 1999 |
| 2663 | IP Network Address Translator (NAT) Terminology and ConsiderationsP. Srisuresh, M. Holdrege | Informational | August 1999 |
| 2757 | Long Thin NetworksG. Montenegro, S. Dawkins, M. Kojo, V. Magret, N. Vaidya | Informational | January 2000 |
| 2760 | Ongoing TCP Research Related to SatellitesM. Allman, Ed., S. Dawkins, D. Glover, J. Griner, D. Tran, T. Henderson, J. Heidemann, J. Touch, H. Kruse, S. Ostermann, K. Scott, J. Semke | Informational | February 2000 |
| 3002 | Overview of 2000 IAB Wireless Internetworking WorkshopD. Mitzel | Informational | December 2000 |
| 3042 | Enhancing TCP's Loss Recovery Using Limited TransmitM. Allman, H. Balakrishnan, S. Floyd | Proposed Standard | January 2001 |