| 4555 | IKEv2 Mobility and Multihoming Protocol (MOBIKE)P. Eronen | Proposed Standard | June 2006 |
| 4556 | Public Key Cryptography for Initial Authentication in Kerberos (PKINIT)L. Zhu, B. Tung | Proposed Standard | June 2006 |
| 4557 | Online Certificate Status Protocol (OCSP) Support for Public Key Cryptography for Initial Authentication in Kerberos (PKINIT)L. Zhu, K. Jaganathan, N. Williams | Proposed Standard | June 2006 |
| 4558 | Node-ID Based Resource Reservation Protocol (RSVP) Hello: A Clarification StatementZ. Ali, R. Rahman, D. Prairie, D. Papadimitriou | Proposed Standard | June 2006 |
| 4559 | SPNEGO-based Kerberos and NTLM HTTP Authentication in Microsoft WindowsK. Jaganathan, L. Zhu, J. Brezak | Informational | June 2006 |
| 4560 | Definitions of Managed Objects for Remote Ping, Traceroute, and Lookup OperationsJ. Quittek, Ed., K. White, Ed. | Proposed Standard | June 2006 |
| 4561 | Definition of a Record Route Object (RRO) Node-Id Sub-ObjectJ.-P. Vasseur, Ed., Z. Ali, S. Sivabalan | Proposed Standard | June 2006 |
| 4562 | MAC-Forced Forwarding: A Method for Subscriber Separation on an Ethernet Access NetworkT. Melsen, S. Blake | Informational | June 2006 |
| 4563 | The Key ID Information Type for the General Extension Payload in Multimedia Internet KEYing (MIKEY)E. Carrara, V. Lehtovirta, K. Norrman | Proposed Standard | June 2006 |
| 4564 | Objectives for Control and Provisioning of Wireless Access Points (CAPWAP)S. Govindan, Ed., H. Cheng, ZH. Yao, WH. Zhou, L. Yang | Informational | July 2006 |
| 4565 | Evaluation of Candidate Control and Provisioning of Wireless Access Points (CAPWAP) ProtocolsD. Loher, D. Nelson, O. Volinsky, B. Sarikaya | Informational | July 2006 |
| 4566 | SDP: Session Description ProtocolM. Handley, V. Jacobson, C. Perkins · obsoleted by RFC 8866 | Proposed Standard | July 2006 |
| 4567 | Key Management Extensions for Session Description Protocol (SDP) and Real Time Streaming Protocol (RTSP)J. Arkko, F. Lindholm, M. Naslund, K. Norrman, E. Carrara | Proposed Standard | July 2006 |
| 4568 | Session Description Protocol (SDP) Security Descriptions for Media StreamsF. Andreasen, M. Baugher, D. Wing | Proposed Standard | July 2006 |
| 4569 | Internet Assigned Number Authority (IANA) Registration of the Message Media Feature TagG. Camarillo | Informational | July 2006 |
| 4570 | Session Description Protocol (SDP) Source FiltersB. Quinn, R. Finlayson | Proposed Standard | July 2006 |
| 4571 | Framing Real-time Transport Protocol (RTP) and RTP Control Protocol (RTCP) Packets over Connection-Oriented TransportJ. Lazzaro | Proposed Standard | July 2006 |
| 4572 | Connection-Oriented Media Transport over the Transport Layer Security (TLS) Protocol in the Session Description Protocol (SDP)J. Lennox · obsoleted by RFC 8122 | Proposed Standard | July 2006 |
| 4573 | MIME Type Registration for RTP Payload Format for H.224R. Even, A. Lochbaum | Proposed Standard | July 2006 |
| 4574 | The Session Description Protocol (SDP) Label AttributeO. Levin, G. Camarillo | Proposed Standard | August 2006 |
| 4575 | A Session Initiation Protocol (SIP) Event Package for Conference StateJ. Rosenberg, H. Schulzrinne, O. Levin, Ed. | Proposed Standard | August 2006 |
| 4576 | Using a Link State Advertisement (LSA) Options Bit to Prevent Looping in BGP/MPLS IP Virtual Private Networks (VPNs)E. Rosen, P. Psenak, P. Pillay-Esnault | Proposed Standard | June 2006 |
| 4577 | OSPF as the Provider/Customer Edge Protocol for BGP/MPLS IP Virtual Private Networks (VPNs)E. Rosen, P. Psenak, P. Pillay-Esnault | Proposed Standard | June 2006 |
| 4578 | Dynamic Host Configuration Protocol (DHCP) Options for the Intel Preboot eXecution Environment (PXE)M. Johnston, S. Venaas, Ed. | Informational | November 2006 |
| 4579 | Session Initiation Protocol (SIP) Call Control - Conferencing for User AgentsA. Johnston, O. Levin | Best Current Practice | August 2006 |
| 4580 | Dynamic Host Configuration Protocol for IPv6 (DHCPv6) Relay Agent Subscriber-ID OptionB. Volz | Proposed Standard | June 2006 |
| 4581 | Cryptographically Generated Addresses (CGA) Extension Field FormatM. Bagnulo, J. Arkko | Proposed Standard | October 2006 |
| 4582 | The Binary Floor Control Protocol (BFCP)G. Camarillo, J. Ott, K. Drage · obsoleted by RFC 8855 | Proposed Standard | November 2006 |
| 4583 | Session Description Protocol (SDP) Format for Binary Floor Control Protocol (BFCP) StreamsG. Camarillo · obsoleted by RFC 8856 | Proposed Standard | November 2006 |
| 4584 | Extension to Sockets API for Mobile IPv6S. Chakrabarti, E. Nordmark | Informational | July 2006 |
| 4585 | Extended RTP Profile for Real-time Transport Control Protocol (RTCP)-Based Feedback (RTP/AVPF)J. Ott, S. Wenger, N. Sato, C. Burmeister, J. Rey | Proposed Standard | July 2006 |
| 4586 | Extended RTP Profile for Real-time Transport Control Protocol (RTCP)-Based Feedback: Results of the Timing Rule SimulationsC. Burmeister, R. Hakenberg, A. Miyazaki, J. Ott, N. Sato, S. Fukunaga | Informational | July 2006 |
| 4587 | RTP Payload Format for H.261 Video StreamsR. Even | Proposed Standard | August 2006 |
| 4588 | RTP Retransmission Payload FormatJ. Rey, D. Leon, A. Miyazaki, V. Varsa, R. Hakenberg | Proposed Standard | July 2006 |
| 4589 | Location Types RegistryH. Schulzrinne, H. Tschofenig | Proposed Standard | July 2006 |
| 4590 | RADIUS Extension for Digest AuthenticationB. Sterman, D. Sadolevsky, D. Schwartz, D. Williams, W. Beck · obsoleted by RFC 5090 | Proposed Standard | July 2006 |
| 4591 | Frame Relay over Layer 2 Tunneling Protocol Version 3 (L2TPv3)M. Townsley, G. Wilkie, S. Booth, S. Bryant, J. Lau | Proposed Standard | August 2006 |
| 4592 | The Role of Wildcards in the Domain Name SystemE. Lewis | Proposed Standard | July 2006 |
| 4593 | Generic Threats to Routing ProtocolsA. Barbir, S. Murphy, Y. Yang | Informational | October 2006 |
| 4594 | Configuration Guidelines for DiffServ Service ClassesJ. Babiarz, K. Chan, F. Baker | Informational | August 2006 |
| 4595 | Use of IKEv2 in the Fibre Channel Security Association Management ProtocolF. Maino, D. Black | Informational | July 2006 |
| 4596 | Guidelines for Usage of the Session Initiation Protocol (SIP) Caller Preferences ExtensionJ. Rosenberg, P. Kyzivat | Informational | July 2006 |
| 4597 | Conferencing ScenariosR. Even, N. Ismail | Informational | August 2006 |
| 4598 | Real-time Transport Protocol (RTP) Payload Format for Enhanced AC-3 (E-AC-3) AudioB. Link | Proposed Standard | July 2006 |
| 4601 | Protocol Independent Multicast - Sparse Mode (PIM-SM): Protocol Specification (Revised)B. Fenner, M. Handley, H. Holbrook, I. Kouvelas · obsoleted by RFC 7761 | Proposed Standard | August 2006 |
| 4602 | Protocol Independent Multicast - Sparse Mode (PIM-SM) IETF Proposed Standard Requirements AnalysisT. Pusateri | Informational | August 2006 |
| 4603 | Additional Values for the NAS-Port-Type AttributeG. Zorn, G. Weber, R. Foltak | Informational | July 2006 |
| 4604 | Using Internet Group Management Protocol Version 3 (IGMPv3) and Multicast Listener Discovery Protocol Version 2 (MLDv2) for Source-Specific MulticastH. Holbrook, B. Cain, B. Haberman | Proposed Standard | August 2006 |
| 4605 | Internet Group Management Protocol (IGMP) / Multicast Listener Discovery (MLD)-Based Multicast Forwarding ("IGMP/MLD Proxying")B. Fenner, H. He, B. Haberman, H. Sandick | Proposed Standard | August 2006 |
| 4606 | Generalized Multi-Protocol Label Switching (GMPLS) Extensions for Synchronous Optical Network (SONET) and Synchronous Digital Hierarchy (SDH) ControlE. Mannie, D. Papadimitriou | Proposed Standard | August 2006 |
| 4607 | Source-Specific Multicast for IPH. Holbrook, B. Cain | Proposed Standard | August 2006 |
| 4608 | Source-Specific Protocol Independent Multicast in 232/8D. Meyer, R. Rockell, G. Shepherd | Best Current Practice | August 2006 |
| 4609 | Protocol Independent Multicast - Sparse Mode (PIM-SM) Multicast Routing Security Issues and EnhancementsP. Savola, R. Lehtonen, D. Meyer | Informational | October 2006 |
| 4610 | Anycast-RP Using Protocol Independent Multicast (PIM)D. Farinacci, Y. Cai | Proposed Standard | August 2006 |
| 4611 | Multicast Source Discovery Protocol (MSDP) Deployment ScenariosM. McBride, J. Meylor, D. Meyer | Best Current Practice | August 2006 |
| 4612 | Real-Time Facsimile (T.38) - audio/t38 MIME Sub-type RegistrationP. Jones, H. Tamura | Historic | August 2006 |
| 4613 | Media Type Registrations for Downloadable Sounds for Musical Instrument Digital Interface (MIDI)P. Frojdh, U. Lindgren, M. Westerlund | Informational | September 2006 |
| 4614 | A Roadmap for Transmission Control Protocol (TCP) Specification DocumentsM. Duke, R. Braden, W. Eddy, E. Blanton · obsoleted by RFC 7414 | Informational | September 2006 |
| 4615 | The Advanced Encryption Standard-Cipher-based Message Authentication Code-Pseudo-Random Function-128 (AES-CMAC-PRF-128) Algorithm for the Internet Key Exchange Protocol (IKE)J. Song, R. Poovendran, J. Lee, T. Iwata | Proposed Standard | August 2006 |
| 4616 | The PLAIN Simple Authentication and Security Layer (SASL) MechanismK. Zeilenga, Ed. | Proposed Standard | August 2006 |
| 4617 | A Uniform Resource Name (URN) Formal Namespace for the Latvian National Government Integration ProjectJ. Kornijenko | Informational | August 2006 |
| 4618 | Encapsulation Methods for Transport of PPP/High-Level Data Link Control (HDLC) over MPLS NetworksL. Martini, E. Rosen, G. Heron, A. Malis | Proposed Standard | September 2006 |
| 4619 | Encapsulation Methods for Transport of Frame Relay over Multiprotocol Label Switching (MPLS) NetworksL. Martini, Ed., C. Kawa, Ed., A. Malis, Ed. | Proposed Standard | September 2006 |
| 4620 | IPv6 Node Information QueriesM. Crawford, B. Haberman, Ed. | Experimental | August 2006 |
| 4621 | Design of the IKEv2 Mobility and Multihoming (MOBIKE) ProtocolT. Kivinen, H. Tschofenig | Informational | August 2006 |
| 4622 | Internationalized Resource Identifiers (IRIs) and Uniform Resource Identifiers (URIs) for the Extensible Messaging and Presence Protocol (XMPP)P. Saint-Andre · obsoleted by RFC 5122 | Proposed Standard | August 2006 |
| 4623 | Pseudowire Emulation Edge-to-Edge (PWE3) Fragmentation and ReassemblyA. Malis, M. Townsley | Proposed Standard | August 2006 |
| 4624 | Multicast Source Discovery Protocol (MSDP) MIBB. Fenner, D. Thaler | Experimental | October 2006 |
| 4625 | Fibre Channel Routing Information MIBC. DeSanti, K. McCloghrie, S. Kode, S. Gai | Proposed Standard | September 2006 |
| 4626 | MIB for Fibre Channel's Fabric Shortest Path First (FSPF) ProtocolC. DeSanti, V. Gaonkar, K. McCloghrie, S. Gai | Proposed Standard | September 2006 |
| 4627 | The application/json Media Type for JavaScript Object Notation (JSON)D. Crockford · obsoleted by RFC 7159 | Informational | July 2006 |
| 4628 | RTP Payload Format for H.263 Moving RFC 2190 to Historic StatusR. Even | Informational | February 2007 |
| 4629 | RTP Payload Format for ITU-T Rec. H.263 VideoJ. Ott, C. Bormann, G. Sullivan, S. Wenger, R. Even, Ed. | Proposed Standard | January 2007 |
| 4630 | Update to DirectoryString Processing in the Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) ProfileR. Housley, S. Santesson · obsoleted by RFC 5280 | Proposed Standard | August 2006 |
| 4631 | Link Management Protocol (LMP) Management Information Base (MIB)M. Dubuc, T. Nadeau, J. Lang, E. McGinnis, A. Farrel | Proposed Standard | September 2006 |
| 4632 | Classless Inter-domain Routing (CIDR): The Internet Address Assignment and Aggregation PlanV. Fuller, T. Li | Best Current Practice | August 2006 |
| 4633 | Experiment in Long-Term Suspensions From Internet Engineering Task Force (IETF) Mailing ListsS. Hartman | Experimental | August 2006 |
| 4634 | US Secure Hash Algorithms (SHA and HMAC-SHA)D. Eastlake 3rd, T. Hansen · obsoleted by RFC 6234 | Informational | August 2006 |
| 4635 | HMAC SHA (Hashed Message Authentication Code, Secure Hash Algorithm) TSIG Algorithm IdentifiersD. Eastlake 3rd · obsoleted by RFC 8945 | Proposed Standard | August 2006 |
| 4636 | Foreign Agent Error Extension for Mobile IPv4C. Perkins | Proposed Standard | October 2006 |
| 4638 | Accommodating a Maximum Transit Unit/Maximum Receive Unit (MTU/MRU) Greater Than 1492 in the Point-to-Point Protocol over Ethernet (PPPoE)P. Arberg, D. Kourkouzelis, M. Duckett, T. Anschutz, J. Moisand | Informational | September 2006 |
| 4639 | Cable Device Management Information Base for Data-Over-Cable Service Interface Specification (DOCSIS) Compliant Cable Modems and Cable Modem Termination SystemsR. Woundy, K. Marez | Proposed Standard | December 2006 |
| 4640 | Problem Statement for bootstrapping Mobile IPv6 (MIPv6)A. Patel, Ed., G. Giaretta, Ed. | Informational | September 2006 |
| 4641 | DNSSEC Operational PracticesO. Kolkman, R. Gieben · obsoleted by RFC 6781 | Informational | September 2006 |
| 4642 | Using Transport Layer Security (TLS) with Network News Transfer Protocol (NNTP)K. Murchison, J. Vinocur, C. Newman | Proposed Standard | October 2006 |
| 4643 | Network News Transfer Protocol (NNTP) Extension for AuthenticationJ. Vinocur, K. Murchison | Proposed Standard | October 2006 |
| 4644 | Network News Transfer Protocol (NNTP) Extension for Streaming FeedsJ. Vinocur, K. Murchison | Proposed Standard | October 2006 |
| 4645 | Initial Language Subtag RegistryD. Ewell | Informational | September 2006 |
| 4646 | Tags for Identifying LanguagesA. Phillips, M. Davis · obsoleted by RFC 5646 | Best Current Practice | September 2006 |
| 4647 | Matching of Language TagsA. Phillips, Ed., M. Davis, Ed. | Best Current Practice | September 2006 |
| 4648 | The Base16, Base32, and Base64 Data EncodingsS. Josefsson | Proposed Standard | October 2006 |
| 4649 | Dynamic Host Configuration Protocol for IPv6 (DHCPv6) Relay Agent Remote-ID OptionB. Volz | Proposed Standard | August 2006 |
| 4650 | HMAC-Authenticated Diffie-Hellman for Multimedia Internet KEYing (MIKEY)M. Euchner | Proposed Standard | September 2006 |
| 4651 | A Taxonomy and Analysis of Enhancements to Mobile IPv6 Route OptimizationC. Vogt, J. Arkko | Informational | February 2007 |
| 4652 | Evaluation of Existing Routing Protocols against Automatic Switched Optical Network (ASON) Routing RequirementsD. Papadimitriou, Ed., L. Ong, J. Sadler, S. Shew, D. Ward | Informational | October 2006 |
| 4653 | Improving the Robustness of TCP to Non-Congestion EventsS. Bhandarkar, A. L. N. Reddy, M. Allman, E. Blanton | Experimental | August 2006 |