| 4001 | Textual Conventions for Internet Network AddressesM. Daniele, B. Haberman, S. Routhier, J. Schoenwaelder | Proposed Standard | March 2005 |
| 4002 | IANA Registration for Enumservice 'web' and 'ft'R. Brandner, L. Conroy, R. Stastny | Proposed Standard | February 2005 |
| 4003 | GMPLS Signaling Procedure for Egress ControlL. Berger | Proposed Standard | February 2005 |
| 4004 | Diameter Mobile IPv4 ApplicationP. Calhoun, T. Johansson, C. Perkins, T. Hiller, Ed., P. McCann | Proposed Standard | August 2005 |
| 4005 | Diameter Network Access Server ApplicationP. Calhoun, G. Zorn, D. Spence, D. Mitton · obsoleted by RFC 7155 | Proposed Standard | August 2005 |
| 4006 | Diameter Credit-Control ApplicationH. Hakala, L. Mattila, J-P. Koskinen, M. Stura, J. Loughney · obsoleted by RFC 8506 | Proposed Standard | August 2005 |
| 4007 | IPv6 Scoped Address ArchitectureS. Deering, B. Haberman, T. Jinmei, E. Nordmark, B. Zill | Proposed Standard | March 2005 |
| 4008 | Definitions of Managed Objects for Network Address Translators (NAT)R. Rohit, P. Srisuresh, R. Raghunarayan, N. Pai, C. Wang · obsoleted by RFC 7658 | Proposed Standard | March 2005 |
| 4009 | The SEED Encryption AlgorithmJ. Park, S. Lee, J. Kim, J. Lee · obsoleted by RFC 4269 | Informational | February 2005 |
| 4010 | Use of the SEED Encryption Algorithm in Cryptographic Message Syntax (CMS)J. Park, S. Lee, J. Kim, J. Lee | Proposed Standard | February 2005 |
| 4011 | Policy Based Management MIBS. Waldbusser, J. Saperia, T. Hongal | Proposed Standard | March 2005 |
| 4012 | Routing Policy Specification Language next generation (RPSLng)L. Blunk, J. Damas, F. Parent, A. Robachevsky | Proposed Standard | March 2005 |
| 4013 | SASLprep: Stringprep Profile for User Names and PasswordsK. Zeilenga · obsoleted by RFC 7613 | Proposed Standard | March 2005 |
| 4014 | Remote Authentication Dial-In User Service (RADIUS) Attributes Suboption for the Dynamic Host Configuration Protocol (DHCP) Relay Agent Information OptionR. Droms, J. Schnizlein | Proposed Standard | February 2005 |
| 4015 | The Eifel Response Algorithm for TCPR. Ludwig, A. Gurtov | Proposed Standard | February 2005 |
| 4016 | Protocol for Carrying Authentication and Network Access (PANA) Threat Analysis and Security RequirementsM. Parthasarathy | Informational | March 2005 |
| 4017 | Extensible Authentication Protocol (EAP) Method Requirements for Wireless LANsD. Stanley, J. Walker, B. Aboba | Informational | March 2005 |
| 4018 | Finding Internet Small Computer Systems Interface (iSCSI) Targets and Name Servers by Using Service Location Protocol version 2 (SLPv2)M. Bakke, J. Hufferd, K. Voruganti, M. Krueger, T. Sperry | Proposed Standard | May 2005 |
| 4019 | RObust Header Compression (ROHC): Profiles for User Datagram Protocol (UDP) LiteG. Pelletier | Proposed Standard | April 2005 |
| 4020 | Early IANA Allocation of Standards Track Code PointsK. Kompella, A. Zinin · obsoleted by RFC 7120 | Best Current Practice | March 2005 |
| 4021 | Registration of Mail and MIME Header FieldsG. Klyne, J. Palme | Proposed Standard | March 2005 |
| 4022 | Management Information Base for the Transmission Control Protocol (TCP)R. Raghunarayan, Ed. | Proposed Standard | March 2005 |
| 4023 | Encapsulating MPLS in IP or Generic Routing Encapsulation (GRE)T. Worster, Y. Rekhter, E. Rosen, Ed. | Proposed Standard | March 2005 |
| 4024 | Voice Messaging Client BehaviourG. Parsons, J. Maruszak | Informational | July 2005 |
| 4025 | A Method for Storing IPsec Keying Material in DNSM. Richardson | Proposed Standard | March 2005 |
| 4026 | Provider Provisioned Virtual Private Network (VPN) TerminologyL. Andersson, T. Madsen | Informational | March 2005 |
| 4027 | Domain Name System Media TypesS. Josefsson | Informational | May 2005 |
| 4028 | Session Timers in the Session Initiation Protocol (SIP)S. Donovan, J. Rosenberg | Proposed Standard | May 2005 |
| 4029 | Scenarios and Analysis for Introducing IPv6 into ISP NetworksM. Lind, V. Ksinant, S. Park, A. Baudot, P. Savola | Informational | March 2005 |
| 4030 | The Authentication Suboption for the Dynamic Host Configuration Protocol (DHCP) Relay Agent OptionM. Stapp, T. Lemon | Proposed Standard | April 2005 |
| 4031 | Service Requirements for Layer 3 Provider Provisioned Virtual Private Networks (PPVPNs)M. Carugi, Ed., D. McDysan, Ed. | Informational | April 2005 |
| 4032 | Update to the Session Initiation Protocol (SIP) Preconditions FrameworkG. Camarillo, P. Kyzivat | Proposed Standard | March 2005 |
| 4033 | DNS Security Introduction and RequirementsR. Arends, R. Austein, M. Larson, D. Massey, S. Rose | Proposed Standard | March 2005 |
| 4034 | Resource Records for the DNS Security ExtensionsR. Arends, R. Austein, M. Larson, D. Massey, S. Rose | Proposed Standard | March 2005 |
| 4035 | Protocol Modifications for the DNS Security ExtensionsR. Arends, R. Austein, M. Larson, D. Massey, S. Rose | Proposed Standard | March 2005 |
| 4036 | Management Information Base for Data Over Cable Service Interface Specification (DOCSIS) Cable Modem Termination Systems for Subscriber ManagementW. Sawyer | Proposed Standard | April 2005 |
| 4037 | Open Pluggable Edge Services (OPES) Callout Protocol (OCP) CoreA. Rousskov | Proposed Standard | March 2005 |
| 4038 | Application Aspects of IPv6 TransitionM-K. Shin, Ed., Y-G. Hong, J. Hagino, P. Savola, E. M. Castro | Informational | March 2005 |
| 4039 | Rapid Commit Option for the Dynamic Host Configuration Protocol version 4 (DHCPv4)S. Park, P. Kim, B. Volz | Proposed Standard | March 2005 |
| 4040 | RTP Payload Format for a 64 kbit/s Transparent CallR. Kreuter | Proposed Standard | April 2005 |
| 4041 | Requirements for Morality Sections in Routing Area DraftsA. Farrel | Informational | 1 April 2005 |
| 4042 | UTF-9 and UTF-18 Efficient Transformation Formats of UnicodeM. Crispin | Informational | 1 April 2005 |
| 4043 | Internet X.509 Public Key Infrastructure Permanent IdentifierD. Pinkas, T. Gindin | Proposed Standard | May 2005 |
| 4044 | Fibre Channel Management MIBK. McCloghrie | Proposed Standard | May 2005 |
| 4045 | Extensions to Support Efficient Carrying of Multicast Traffic in Layer-2 Tunneling Protocol (L2TP)G. Bourdon | Experimental | April 2005 |
| 4046 | Multicast Security (MSEC) Group Key Management ArchitectureM. Baugher, R. Canetti, L. Dondeti, F. Lindholm | Informational | May 2005 |
| 4047 | MIME Sub-type Registrations for Flexible Image Transport System (FITS)S. Allen, D. Wells | Informational | April 2005 |
| 4048 | RFC 1888 Is ObsoleteB. Carpenter | Informational | April 2005 |
| 4049 | BinaryTime: An Alternate Format for Representing Date and Time in ASN.1R. Housley · obsoleted by RFC 6019 | Experimental | April 2005 |
| 4050 | Using the Elliptic Curve Signature Algorithm (ECDSA) for XML Digital SignaturesS. Blake-Wilson, G. Karlinger, T. Kobayashi, Y. Wang | Informational | April 2005 |
| 4051 | Additional XML Security Uniform Resource Identifiers (URIs)D. Eastlake 3rd · obsoleted by RFC 6931 | Proposed Standard | April 2005 |
| 4052 | IAB Processes for Management of IETF Liaison RelationshipsL. Daigle, Ed., Internet Architecture Board | Best Current Practice | April 2005 |
| 4053 | Procedures for Handling Liaison Statements to and from the IETFS. Trowbridge, S. Bradner, F. Baker | Best Current Practice | April 2005 |
| 4054 | Impairments and Other Constraints on Optical Layer RoutingJ. Strand, Ed., A. Chiu, Ed. | Informational | May 2005 |
| 4055 | Additional Algorithms and Identifiers for RSA Cryptography for use in the Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) ProfileJ. Schaad, B. Kaliski, R. Housley | Proposed Standard | June 2005 |
| 4056 | Use of the RSASSA-PSS Signature Algorithm in Cryptographic Message Syntax (CMS)J. Schaad | Proposed Standard | June 2005 |
| 4057 | IPv6 Enterprise Network ScenariosJ. Bound, Ed. | Informational | June 2005 |
| 4058 | Protocol for Carrying Authentication for Network Access (PANA) RequirementsA. Yegin, Ed., Y. Ohba, R. Penno, G. Tsirtsis, C. Wang | Informational | May 2005 |
| 4059 | Internet X.509 Public Key Infrastructure Warranty Certificate ExtensionD. Linsenbardt, S. Pontius, A. Sturgeon | Informational | May 2005 |
| 4060 | RTP Payload Formats for European Telecommunications Standards Institute (ETSI) European Standard ES 202 050, ES 202 211, and ES 202 212 Distributed Speech Recognition EncodingQ. Xie, D. Pearce | Proposed Standard | May 2005 |
| 4061 | Benchmarking Basic OSPF Single Router Control Plane ConvergenceV. Manral, R. White, A. Shaikh | Informational | April 2005 |
| 4062 | OSPF Benchmarking Terminology and ConceptsV. Manral, R. White, A. Shaikh | Informational | April 2005 |
| 4063 | Considerations When Using Basic OSPF Convergence BenchmarksV. Manral, R. White, A. Shaikh | Informational | April 2005 |
| 4064 | Experimental Message, Extensions, and Error Codes for Mobile IPv4A. Patel, K. Leung | Proposed Standard | May 2005 |
| 4065 | Instructions for Seamoby and Experimental Mobility Protocol IANA AllocationsJ. Kempf | Experimental | July 2005 |
| 4066 | Candidate Access Router Discovery (CARD)M. Liebsch, Ed., A. Singh, Ed., H. Chaskar, D. Funato, E. Shim | Experimental | July 2005 |
| 4067 | Context Transfer Protocol (CXTP)J. Loughney, Ed., M. Nakhjiri, C. Perkins, R. Koodli | Experimental | July 2005 |
| 4068 | Fast Handovers for Mobile IPv6R. Koodli, Ed. · obsoleted by RFC 5268 | Experimental | July 2005 |
| 4069 | Definitions of Managed Object Extensions for Very High Speed Digital Subscriber Lines (VDSL) Using Single Carrier Modulation (SCM) Line CodingM. Dodge, B. Ray | Proposed Standard | May 2005 |
| 4070 | Definitions of Managed Object Extensions for Very High Speed Digital Subscriber Lines (VDSL) Using Multiple Carrier Modulation (MCM) Line CodingM. Dodge, B. Ray | Proposed Standard | May 2005 |
| 4071 | Structure of the IETF Administrative Support Activity (IASA)R. Austein, Ed., B. Wijnen, Ed. · obsoleted by RFC 8711 | Best Current Practice | April 2005 |
| 4072 | Diameter Extensible Authentication Protocol (EAP) ApplicationP. Eronen, Ed., T. Hiller, G. Zorn | Proposed Standard | August 2005 |
| 4073 | Protecting Multiple Contents with the Cryptographic Message Syntax (CMS)R. Housley | Proposed Standard | May 2005 |
| 4074 | Common Misbehavior Against DNS Queries for IPv6 AddressesY. Morishita, T. Jinmei | Informational | June 2005 |
| 4075 | Simple Network Time Protocol (SNTP) Configuration Option for DHCPv6V. Kalusivalingam | Proposed Standard | May 2005 |
| 4076 | Renumbering Requirements for Stateless Dynamic Host Configuration Protocol for IPv6 (DHCPv6)T. Chown, S. Venaas, A. Vijayabhaskar | Informational | May 2005 |
| 4077 | A Negative Acknowledgement Mechanism for Signaling CompressionA.B. Roach | Proposed Standard | May 2005 |
| 4078 | The TV-Anytime Content Reference Identifier (CRID)N. Earnshaw, S. Aoki, A. Ashley, W. Kameyama | Informational | May 2005 |
| 4079 | A Presence Architecture for the Distribution of GEOPRIV Location ObjectsJ. Peterson | Informational | July 2005 |
| 4080 | Next Steps in Signaling (NSIS): FrameworkR. Hancock, G. Karagiannis, J. Loughney, S. Van den Bosch | Informational | June 2005 |
| 4081 | Security Threats for Next Steps in Signaling (NSIS)H. Tschofenig, D. Kroeselberg | Informational | June 2005 |
| 4082 | Timed Efficient Stream Loss-Tolerant Authentication (TESLA): Multicast Source Authentication Transform IntroductionA. Perrig, D. Song, R. Canetti, J. D. Tygar, B. Briscoe | Informational | June 2005 |
| 4083 | Input 3rd-Generation Partnership Project (3GPP) Release 5 Requirements on the Session Initiation Protocol (SIP)M. Garcia-Martin | Informational | May 2005 |
| 4084 | Terminology for Describing Internet ConnectivityJ. Klensin | Best Current Practice | May 2005 |
| 4085 | Embedding Globally-Routable Internet Addresses Considered HarmfulD. Plonka | Best Current Practice | June 2005 |
| 4086 | Randomness Requirements for SecurityD. Eastlake 3rd, J. Schiller, S. Crocker | Best Current Practice | June 2005 |
| 4087 | IP Tunnel MIBD. Thaler | Proposed Standard | June 2005 |
| 4088 | Uniform Resource Identifier (URI) Scheme for the Simple Network Management Protocol (SNMP)D. Black, K. McCloghrie, J. Schoenwaelder | Proposed Standard | June 2005 |
| 4089 | IAB and IESG Recommendation for IETF Administrative RestructuringS. Hollenbeck, Ed., IAB and IESG | Informational | May 2005 |
| 4090 | Fast Reroute Extensions to RSVP-TE for LSP TunnelsP. Pan, Ed., G. Swallow, Ed., A. Atlas, Ed. | Proposed Standard | May 2005 |
| 4091 | The Alternative Network Address Types (ANAT) Semantics for the Session Description Protocol (SDP) Grouping FrameworkG. Camarillo, J. Rosenberg · obsoleted by RFC 5245 | Proposed Standard | June 2005 |
| 4092 | Usage of the Session Description Protocol (SDP) Alternative Network Address Types (ANAT) Semantics in the Session Initiation Protocol (SIP)G. Camarillo, J. Rosenberg · obsoleted by RFC 5245 | Proposed Standard | June 2005 |
| 4093 | Problem Statement: Mobile IPv4 Traversal of Virtual Private Network (VPN) GatewaysF. Adrangi, Ed., H. Levkowetz, Ed. | Informational | August 2005 |
| 4094 | Analysis of Existing Quality-of-Service Signaling ProtocolsJ. Manner, X. Fu | Informational | May 2005 |
| 4095 | Attaching Meaning to Solicitation Class KeywordsC. Malamud | Proposed Standard | May 2005 |
| 4096 | Policy-Mandated Labels Such as "Adv:" in Email Subject Headers Considered Ineffective At BestC. Malamud | Informational | May 2005 |
| 4097 | Middlebox Communications (MIDCOM) Protocol EvaluationM. Barnes, Ed. | Informational | June 2005 |
| 4098 | Terminology for Benchmarking BGP Device Convergence in the Control PlaneH. Berkowitz, E. Davies, Ed., S. Hares, P. Krishnaswamy, M. Lepp | Informational | June 2005 |