| 2093 | Group Key Management Protocol (GKMP) SpecificationH. Harney, C. Muckenhirn | Experimental | July 1997 |
| 2094 | Group Key Management Protocol (GKMP) ArchitectureH. Harney, C. Muckenhirn | Experimental | July 1997 |
| 2362 | Protocol Independent Multicast-Sparse Mode (PIM-SM): Protocol SpecificationD. Estrin, D. Farinacci, A. Helmy, D. Thaler, S. Deering, M. Handley, V. Jacobson, C. Liu, P. Sharma, L. Wei · obsoleted by RFC 4601, RFC 5059 | Experimental | June 1998 |
| 2401 | Security Architecture for the Internet ProtocolS. Kent, R. Atkinson · obsoleted by RFC 4301 | Proposed Standard | November 1998 |
| 2406 | IP Encapsulating Security Payload (ESP)S. Kent, R. Atkinson · obsoleted by RFC 4303, RFC 4305 | Proposed Standard | November 1998 |
| 2408 | Internet Security Association and Key Management Protocol (ISAKMP)D. Maughan, M. Schertler, M. Schneider, J. Turner · obsoleted by RFC 4306 | Historic | November 1998 |
| 2409 | The Internet Key Exchange (IKE)D. Harkins, D. Carrel · obsoleted by RFC 4306 | Historic | November 1998 |
| 2627 | Key Management for Multicast: Issues and ArchitecturesD. Wallner, E. Harder, R. Agee | Informational | June 1999 |
| 2663 | IP Network Address Translator (NAT) Terminology and ConsiderationsP. Srisuresh, M. Holdrege | Informational | August 1999 |
| 2748 | The COPS (Common Open Policy Service) ProtocolD. Durham, Ed., J. Boyle, R. Cohen, S. Herzog, R. Rajan, A. Sastry | Proposed Standard | January 2000 |
| 3019 | IP Version 6 Management Information Base for The Multicast Listener Discovery ProtocolB. Haberman, R. Worzella · obsoleted by RFC 5519 | Proposed Standard | January 2001 |
| 3376 | Internet Group Management Protocol, Version 3B. Cain, S. Deering, I. Kouvelas, B. Fenner, A. Thyagarajan · obsoleted by RFC 9776 | Proposed Standard | October 2002 |
| 3453 | The Use of Forward Error Correction (FEC) in Reliable MulticastM. Luby, L. Vicisano, J. Gemmell, L. Rizzo, M. Handley, J. Crowcroft | Informational | December 2002 |
| 3547 | The Group Domain of InterpretationM. Baugher, B. Weis, T. Hardjono, H. Harney · obsoleted by RFC 6407 | Proposed Standard | July 2003 |