| 5401 | Multicast Negative-Acknowledgment (NACK) Building BlocksB. Adamson, C. Bormann, M. Handley, J. Macker | Proposed Standard | November 2008 |
| 5402 | Compressed Data within an Internet Electronic Data Interchange (EDI) MessageT. Harding, Ed. | Informational | February 2010 |
| 5403 | RPCSEC_GSS Version 2M. Eisler | Proposed Standard | February 2009 |
| 5404 | RTP Payload Format for G.719M. Westerlund, I. Johansson | Proposed Standard | January 2009 |
| 5405 | Unicast UDP Usage Guidelines for Application DesignersL. Eggert, G. Fairhurst · obsoleted by RFC 8085 | Best Current Practice | November 2008 |
| 5406 | Guidelines for Specifying the Use of IPsec Version 2S. Bellovin | Best Current Practice | February 2009 |
| 5407 | Example Call Flows of Race Conditions in the Session Initiation Protocol (SIP)M. Hasebe, J. Koshiko, Y. Suzuki, T. Yoshikawa, P. Kyzivat | Best Current Practice | December 2008 |
| 5408 | Identity-Based Encryption Architecture and Supporting Data StructuresG. Appenzeller, L. Martin, M. Schertler | Informational | January 2009 |
| 5409 | Using the Boneh-Franklin and Boneh-Boyen Identity-Based Encryption Algorithms with the Cryptographic Message Syntax (CMS)L. Martin, M. Schertler | Informational | January 2009 |
| 5410 | Multimedia Internet KEYing (MIKEY) General Extension Payload for Open Mobile Alliance BCAST 1.0A. Jerichow, Ed., L. Piron | Informational | January 2009 |
| 5411 | A Hitchhiker's Guide to the Session Initiation Protocol (SIP)J. Rosenberg | Informational | February 2009 |
| 5412 | Lightweight Access Point ProtocolP. Calhoun, R. Suri, N. Cam-Winget, M. Williams, S. Hares, B. O'Hara, S. Kelly | Historic | February 2010 |
| 5413 | SLAPP: Secure Light Access Point ProtocolP. Narasimhan, D. Harkins, S. Ponnuswamy | Historic | February 2010 |
| 5414 | Wireless LAN Control Protocol (WiCoP)S. Iino, S. Govindan, M. Sugiura, H. Cheng · obsoleted by RFC 5415 | Historic | February 2010 |
| 5415 | Control And Provisioning of Wireless Access Points (CAPWAP) Protocol SpecificationP. Calhoun, Ed., M. Montemurro, Ed., D. Stanley, Ed. | Proposed Standard | March 2009 |
| 5416 | Control and Provisioning of Wireless Access Points (CAPWAP) Protocol Binding for IEEE 802.11P. Calhoun, Ed., M. Montemurro, Ed., D. Stanley, Ed. | Proposed Standard | March 2009 |
| 5417 | Control And Provisioning of Wireless Access Points (CAPWAP) Access Controller DHCP OptionP. Calhoun | Proposed Standard | March 2009 |
| 5418 | Control And Provisioning of Wireless Access Points (CAPWAP) Threat Analysis for IEEE 802.11 DeploymentsS. Kelly, T. Clancy | Informational | March 2009 |
| 5419 | Why the Authentication Data Suboption is Needed for Mobile IPv6 (MIPv6)B. Patil, G. Dommety | Informational | January 2009 |
| 5420 | Encoding of Attributes for MPLS LSP Establishment Using Resource Reservation Protocol Traffic Engineering (RSVP-TE)A. Farrel, Ed., D. Papadimitriou, JP. Vasseur, A. Ayyangar | Proposed Standard | February 2009 |
| 5421 | Basic Password Exchange within the Flexible Authentication via Secure Tunneling Extensible Authentication Protocol (EAP-FAST)N. Cam-Winget, H. Zhou | Informational | March 2009 |
| 5422 | Dynamic Provisioning Using Flexible Authentication via Secure Tunneling Extensible Authentication Protocol (EAP-FAST)N. Cam-Winget, D. McGrew, J. Salowey, H. Zhou | Informational | March 2009 |
| 5423 | Internet Message Store EventsR. Gellens, C. Newman | Proposed Standard | March 2009 |
| 5424 | The Syslog ProtocolR. Gerhards | Proposed Standard | March 2009 |
| 5425 | Transport Layer Security (TLS) Transport Mapping for SyslogF. Miao, Ed., Y. Ma, Ed., J. Salowey, Ed. | Proposed Standard | March 2009 |
| 5426 | Transmission of Syslog Messages over UDPA. Okmianski | Proposed Standard | March 2009 |
| 5427 | Textual Conventions for Syslog ManagementG. Keeni | Proposed Standard | March 2009 |
| 5428 | Management Event Management Information Base (MIB) for PacketCable- and IPCablecom-Compliant DevicesS. Channabasappa, W. De Ketelaere, E. Nechamkin | Proposed Standard | April 2009 |
| 5429 | Sieve Email Filtering: Reject and Extended Reject ExtensionsA. Stone, Ed. | Proposed Standard | March 2009 |
| 5430 | Suite B Profile for Transport Layer Security (TLS)M. Salter, E. Rescorla, R. Housley · obsoleted by RFC 6460 | Historic | March 2009 |
| 5431 | Diameter ITU-T Rw Policy Enforcement Interface ApplicationD. Sun | Informational | March 2009 |
| 5432 | Quality of Service (QoS) Mechanism Selection in the Session Description Protocol (SDP)J. Polk, S. Dhesikan, G. Camarillo | Proposed Standard | March 2009 |
| 5433 | Extensible Authentication Protocol - Generalized Pre-Shared Key (EAP-GPSK) MethodT. Clancy, H. Tschofenig | Proposed Standard | February 2009 |
| 5434 | Considerations for Having a Successful Birds-of-a-Feather (BOF) SessionT. Narten | Informational | February 2009 |
| 5435 | Sieve Email Filtering: Extension for NotificationsA. Melnikov, Ed., B. Leiba, Ed., W. Segmuller, T. Martin | Proposed Standard | January 2009 |
| 5436 | Sieve Notification Mechanism: mailtoB. Leiba, M. Haardt | Proposed Standard | January 2009 |
| 5437 | Sieve Notification Mechanism: Extensible Messaging and Presence Protocol (XMPP)P. Saint-Andre, A. Melnikov | Proposed Standard | January 2009 |
| 5438 | Instant Message Disposition Notification (IMDN)E. Burger, H. Khartabil | Proposed Standard | February 2009 |
| 5439 | An Analysis of Scaling Issues in MPLS-TE Core NetworksS. Yasukawa, A. Farrel, O. Komolafe | Informational | February 2009 |
| 5440 | Path Computation Element (PCE) Communication Protocol (PCEP)JP. Vasseur, Ed., JL. Le Roux, Ed. | Proposed Standard | March 2009 |
| 5441 | A Backward-Recursive PCE-Based Computation (BRPC) Procedure to Compute Shortest Constrained Inter-Domain Traffic Engineering Label Switched PathsJP. Vasseur, Ed., R. Zhang, N. Bitar, JL. Le Roux | Proposed Standard | April 2009 |
| 5442 | LEMONADE Architecture - Supporting Open Mobile Alliance (OMA) Mobile Email (MEM) Using Internet MailE. Burger, G. Parsons | Informational | March 2009 |
| 5443 | LDP IGP SynchronizationM. Jork, A. Atlas, L. Fang | Informational | March 2009 |
| 5444 | Generalized Mobile Ad Hoc Network (MANET) Packet/Message FormatT. Clausen, C. Dearlove, J. Dean, C. Adjih | Proposed Standard | February 2009 |
| 5445 | Basic Forward Error Correction (FEC) SchemesM. Watson | Proposed Standard | March 2009 |
| 5446 | Service Selection for Mobile IPv4J. Korhonen, U. Nilsson | Informational | February 2009 |
| 5447 | Diameter Mobile IPv6: Support for Network Access Server to Diameter Server InteractionJ. Korhonen, Ed., J. Bournelle, H. Tschofenig, C. Perkins, K. Chowdhury | Proposed Standard | February 2009 |
| 5448 | Improved Extensible Authentication Protocol Method for 3rd Generation Authentication and Key Agreement (EAP-AKA')J. Arkko, V. Lehtovirta, P. Eronen | Informational | May 2009 |
| 5449 | OSPF Multipoint Relay (MPR) Extension for Ad Hoc NetworksE. Baccelli, P. Jacquet, D. Nguyen, T. Clausen | Experimental | February 2009 |
| 5450 | Transmission Time Offsets in RTP StreamsD. Singer, H. Desineni | Proposed Standard | March 2009 |
| 5451 | Message Header Field for Indicating Message Authentication StatusM. Kucherawy · obsoleted by RFC 7001 | Proposed Standard | April 2009 |
| 5452 | Measures for Making DNS More Resilient against Forged AnswersA. Hubert, R. van Mook | Proposed Standard | January 2009 |
| 5453 | Reserved IPv6 Interface IdentifiersS. Krishnan | Proposed Standard | February 2009 |
| 5454 | Dual-Stack Mobile IPv4G. Tsirtsis, V. Park, H. Soliman | Proposed Standard | March 2009 |
| 5455 | Diffserv-Aware Class-Type Object for the Path Computation Element Communication ProtocolS. Sivabalan, Ed., J. Parker, S. Boutros, K. Kumaki | Proposed Standard | March 2009 |
| 5456 | IAX: Inter-Asterisk eXchange Version 2M. Spencer, B. Capouch, E. Guy, Ed., F. Miller, K. Shumard | Informational | February 2010 |
| 5457 | IANA Considerations for IAX: Inter-Asterisk eXchange Version 2E. Guy, Ed. | Informational | February 2010 |
| 5458 | Security Requirements for the Unidirectional Lightweight Encapsulation (ULE) ProtocolH. Cruickshank, P. Pillai, M. Noisternig, S. Iyengar | Informational | March 2009 |
| 5459 | G.729.1 RTP Payload Format Update: Discontinuous Transmission (DTX) SupportA. Sollaud | Proposed Standard | January 2009 |
| 5460 | DHCPv6 Bulk LeasequeryM. Stapp | Proposed Standard | February 2009 |
| 5461 | TCP's Reaction to Soft ErrorsF. Gont | Informational | February 2009 |
| 5462 | Multiprotocol Label Switching (MPLS) Label Stack Entry: "EXP" Field Renamed to "Traffic Class" FieldL. Andersson, R. Asati | Proposed Standard | February 2009 |
| 5463 | Sieve Email Filtering: Ihave ExtensionN. Freed | Proposed Standard | March 2009 |
| 5464 | The IMAP METADATA ExtensionC. Daboo | Proposed Standard | February 2009 |
| 5465 | The IMAP NOTIFY ExtensionA. Gulbrandsen, C. King, A. Melnikov | Proposed Standard | February 2009 |
| 5466 | IMAP4 Extension for Named Searches (Filters)A. Melnikov, C. King | Proposed Standard | February 2009 |
| 5467 | GMPLS Asymmetric Bandwidth Bidirectional Label Switched Paths (LSPs)L. Berger, A. Takacs, D. Caviglia, D. Fedyk, J. Meuric · obsoleted by RFC 6387 | Experimental | March 2009 |
| 5468 | Performance Analysis of Inter-Domain Path Computation MethodologiesS. Dasgupta, J. de Oliveira, JP. Vasseur | Informational | April 2009 |
| 5469 | DES and IDEA Cipher Suites for Transport Layer Security (TLS)P. Eronen, Ed. · obsoleted by RFC 8996 | Historic | February 2009 |
| 5470 | Architecture for IP Flow Information ExportG. Sadasivan, N. Brownlee, B. Claise, J. Quittek | Informational | March 2009 |
| 5471 | Guidelines for IP Flow Information Export (IPFIX) TestingC. Schmoll, P. Aitken, B. Claise | Informational | March 2009 |
| 5472 | IP Flow Information Export (IPFIX) ApplicabilityT. Zseby, E. Boschi, N. Brownlee, B. Claise | Informational | March 2009 |
| 5473 | Reducing Redundancy in IP Flow Information Export (IPFIX) and Packet Sampling (PSAMP) ReportsE. Boschi, L. Mark, B. Claise | Informational | March 2009 |
| 5474 | A Framework for Packet Selection and ReportingN. Duffield, Ed., D. Chiou, B. Claise, A. Greenberg, M. Grossglauser, J. Rexford | Informational | March 2009 |
| 5475 | Sampling and Filtering Techniques for IP Packet SelectionT. Zseby, M. Molina, N. Duffield, S. Niccolini, F. Raspall | Proposed Standard | March 2009 |
| 5476 | Packet Sampling (PSAMP) Protocol SpecificationsB. Claise, Ed., A. Johnson, J. Quittek | Proposed Standard | March 2009 |
| 5477 | Information Model for Packet Sampling ExportsT. Dietz, B. Claise, P. Aitken, F. Dressler, G. Carle | Proposed Standard | March 2009 |
| 5478 | IANA Registration of New Session Initiation Protocol (SIP) Resource-Priority NamespacesJ. Polk | Proposed Standard | March 2009 |
| 5479 | Requirements and Analysis of Media Security Management ProtocolsD. Wing, Ed., S. Fries, H. Tschofenig, F. Audet | Informational | April 2009 |
| 5480 | Elliptic Curve Cryptography Subject Public Key InformationS. Turner, D. Brown, K. Yiu, R. Housley, T. Polk | Proposed Standard | March 2009 |
| 5481 | Packet Delay Variation Applicability StatementA. Morton, B. Claise | Informational | March 2009 |
| 5482 | TCP User Timeout OptionL. Eggert, F. Gont | Proposed Standard | March 2009 |
| 5483 | ENUM Implementation Issues and ExperiencesL. Conroy, K. Fujiwara | Informational | March 2009 |
| 5484 | Associating Time-Codes with RTP StreamsD. Singer | Proposed Standard | March 2009 |
| 5485 | Digital Signatures on Internet-Draft DocumentsR. Housley | Informational | March 2009 |
| 5486 | Session Peering for Multimedia Interconnect (SPEERMINT) TerminologyD. Malas, Ed., D. Meyer, Ed. | Informational | March 2009 |
| 5487 | Pre-Shared Key Cipher Suites for TLS with SHA-256/384 and AES Galois Counter ModeM. Badra | Proposed Standard | March 2009 |
| 5488 | Network Mobility (NEMO) Management Information BaseS. Gundavelli, G. Keeni, K. Koide, K. Nagami | Proposed Standard | April 2009 |
| 5489 | ECDHE_PSK Cipher Suites for Transport Layer Security (TLS)M. Badra, I. Hajjeh | Informational | March 2009 |
| 5490 | The Sieve Mail-Filtering Language -- Extensions for Checking Mailbox Status and Accessing Mailbox MetadataA. Melnikov | Proposed Standard | March 2009 |
| 5491 | GEOPRIV Presence Information Data Format Location Object (PIDF-LO) Usage Clarification, Considerations, and RecommendationsJ. Winterbottom, M. Thomson, H. Tschofenig | Proposed Standard | March 2009 |
| 5492 | Capabilities Advertisement with BGP-4J. Scudder, R. Chandra | Draft Standard | February 2009 |
| 5493 | Requirements for the Conversion between Permanent Connections and Switched Connections in a Generalized Multiprotocol Label Switching (GMPLS) NetworkD. Caviglia, D. Bramanti, D. Li, D. McDysan | Informational | April 2009 |
| 5494 | IANA Allocation Guidelines for the Address Resolution Protocol (ARP)J. Arkko, C. Pignataro | Proposed Standard | April 2009 |
| 5495 | Description of the Resource Reservation Protocol - Traffic-Engineered (RSVP-TE) Graceful Restart ProceduresD. Li, J. Gao, A. Satyanarayana, S. Bardalai | Informational | March 2009 |
| 5496 | The Reverse Path Forwarding (RPF) Vector TLVIJ. Wijnands, A. Boers, E. Rosen | Proposed Standard | March 2009 |
| 5497 | Representing Multi-Value Time in Mobile Ad Hoc Networks (MANETs)T. Clausen, C. Dearlove | Proposed Standard | March 2009 |
| 5498 | IANA Allocations for Mobile Ad Hoc Network (MANET) ProtocolsI. Chakeres | Proposed Standard | March 2009 |