| 4456 | BGP Route Reflection: An Alternative to Full Mesh Internal BGP (IBGP)T. Bates, E. Chen, R. Chandra | Draft Standard | April 2006 |
| 4457 | The Session Initiation Protocol (SIP) P-User-Database Private-Header (P-Header)G. Camarillo, G. Blanco | Informational | April 2006 |
| 4458 | Session Initiation Protocol (SIP) URIs for Applications such as Voicemail and Interactive Voice Response (IVR)C. Jennings, F. Audet, J. Elwell | Informational | April 2006 |
| 4459 | MTU and Fragmentation Issues with In-the-Network TunnelingP. Savola | Informational | April 2006 |
| 4460 | Stream Control Transmission Protocol (SCTP) Specification Errata and IssuesR. Stewart, I. Arias-Rodriguez, K. Poon, A. Caro, M. Tuexen · obsoleted by RFC 9260 | Informational | April 2006 |
| 4461 | Signaling Requirements for Point-to-Multipoint Traffic-Engineered MPLS Label Switched Paths (LSPs)S. Yasukawa, Ed. | Informational | April 2006 |
| 4462 | Generic Security Service Application Program Interface (GSS-API) Authentication and Key Exchange for the Secure Shell (SSH) ProtocolJ. Hutzelman, J. Salowey, J. Galbraith, V. Welch | Proposed Standard | May 2006 |
| 4463 | A Media Resource Control Protocol (MRCP) Developed by Cisco, Nuance, and SpeechworksS. Shanmugham, P. Monaco, B. Eberman | Informational | April 2006 |
| 4464 | Signaling Compression (SigComp) Users' GuideA. Surtees, M. West | Informational | May 2006 |
| 4465 | Signaling Compression (SigComp) Torture TestsA. Surtees, M. West | Informational | June 2006 |
| 4466 | Collected Extensions to IMAP4 ABNFA. Melnikov, C. Daboo | Proposed Standard | April 2006 |
| 4467 | Internet Message Access Protocol (IMAP) - URLAUTH ExtensionM. Crispin | Proposed Standard | May 2006 |
| 4468 | Message Submission BURL ExtensionC. Newman | Proposed Standard | May 2006 |
| 4469 | Internet Message Access Protocol (IMAP) CATENATE ExtensionP. Resnick | Proposed Standard | April 2006 |
| 4470 | Minimally Covering NSEC Records and DNSSEC On-line SigningS. Weiler, J. Ihren | Proposed Standard | April 2006 |
| 4471 | Derivation of DNS Name Predecessor and SuccessorG. Sisson, B. Laurie | Experimental | September 2006 |
| 4472 | Operational Considerations and Issues with IPv6 DNSA. Durand, J. Ihren, P. Savola | Informational | April 2006 |
| 4473 | Requirements for Internet Media Guides (IMGs)Y. Nomura, R. Walsh, J-P. Luoma, J. Ott, H. Schulzrinne | Informational | May 2006 |
| 4474 | Enhancements for Authenticated Identity Management in the Session Initiation Protocol (SIP)J. Peterson, C. Jennings · obsoleted by RFC 8224 | Proposed Standard | August 2006 |
| 4475 | Session Initiation Protocol (SIP) Torture Test MessagesR. Sparks, Ed., A. Hawrylyshen, A. Johnston, J. Rosenberg, H. Schulzrinne | Informational | May 2006 |
| 4476 | Attribute Certificate (AC) Policies ExtensionC. Francis, D. Pinkas | Proposed Standard | May 2006 |
| 4477 | Dynamic Host Configuration Protocol (DHCP): IPv4 and IPv6 Dual-Stack IssuesT. Chown, S. Venaas, C. Strauf | Informational | May 2006 |
| 4478 | Repeated Authentication in Internet Key Exchange (IKEv2) ProtocolY. Nir | Experimental | April 2006 |
| 4479 | A Data Model for PresenceJ. Rosenberg | Proposed Standard | July 2006 |
| 4480 | RPID: Rich Presence Extensions to the Presence Information Data Format (PIDF)H. Schulzrinne, V. Gurbani, P. Kyzivat, J. Rosenberg | Proposed Standard | July 2006 |
| 4481 | Timed Presence Extensions to the Presence Information Data Format (PIDF) to Indicate Status Information for Past and Future Time IntervalsH. Schulzrinne | Proposed Standard | July 2006 |
| 4482 | CIPID: Contact Information for the Presence Information Data FormatH. Schulzrinne | Proposed Standard | July 2006 |
| 4483 | A Mechanism for Content Indirection in Session Initiation Protocol (SIP) MessagesE. Burger, Ed. | Proposed Standard | May 2006 |
| 4484 | Trait-Based Authorization Requirements for the Session Initiation Protocol (SIP)J. Peterson, J. Polk, D. Sicker, H. Tschofenig | Informational | August 2006 |
| 4485 | Guidelines for Authors of Extensions to the Session Initiation Protocol (SIP)J. Rosenberg, H. Schulzrinne | Informational | May 2006 |
| 4486 | Subcodes for BGP Cease Notification MessageE. Chen, V. Gillet | Proposed Standard | April 2006 |
| 4487 | Mobile IPv6 and Firewalls: Problem StatementF. Le, S. Faccin, B. Patil, H. Tschofenig | Informational | May 2006 |
| 4488 | Suppression of Session Initiation Protocol (SIP) REFER Method Implicit SubscriptionO. Levin | Proposed Standard | May 2006 |
| 4489 | A Method for Generating Link-Scoped IPv6 Multicast AddressesJ-S. Park, M-K. Shin, H-J. Kim | Proposed Standard | April 2006 |
| 4490 | Using the GOST 28147-89, GOST R 34.11-94, GOST R 34.10-94, and GOST R 34.10-2001 Algorithms with Cryptographic Message Syntax (CMS)S. Leontiev, Ed., G. Chudov, Ed. | Proposed Standard | May 2006 |
| 4491 | Using the GOST R 34.10-94, GOST R 34.10-2001, and GOST R 34.11-94 Algorithms with the Internet X.509 Public Key Infrastructure Certificate and CRL ProfileS. Leontiev, Ed., D. Shefanovski, Ed. | Proposed Standard | May 2006 |
| 4492 | Elliptic Curve Cryptography (ECC) Cipher Suites for Transport Layer Security (TLS)S. Blake-Wilson, N. Bolyard, V. Gupta, C. Hawk, B. Moeller · obsoleted by RFC 8422 | Informational | May 2006 |
| 4493 | The AES-CMAC AlgorithmJH. Song, R. Poovendran, J. Lee, T. Iwata | Informational | June 2006 |
| 4494 | The AES-CMAC-96 Algorithm and Its Use with IPsecJH. Song, R. Poovendran, J. Lee | Proposed Standard | June 2006 |
| 4495 | A Resource Reservation Protocol (RSVP) Extension for the Reduction of Bandwidth of a Reservation FlowJ. Polk, S. Dhesikan | Proposed Standard | May 2006 |
| 4496 | Open Pluggable Edge Services (OPES) SMTP Use CasesM. Stecher, A. Barbir | Informational | May 2006 |
| 4497 | Interworking between the Session Initiation Protocol (SIP) and QSIGJ. Elwell, F. Derks, P. Mourot, O. Rousseau | Best Current Practice | May 2006 |
| 4498 | The Managed Object Aggregation MIBG. Keeni | Experimental | May 2006 |
| 4501 | Domain Name System Uniform Resource IdentifiersS. Josefsson | Proposed Standard | May 2006 |
| 4502 | Remote Network Monitoring Management Information Base Version 2S. Waldbusser | Draft Standard | May 2006 |
| 4503 | A Description of the Rabbit Stream Cipher AlgorithmM. Boesgaard, M. Vesterager, E. Zenner | Informational | May 2006 |
| 4504 | SIP Telephony Device Requirements and ConfigurationH. Sinnreich, Ed., S. Lass, C. Stredicke | Informational | May 2006 |
| 4505 | Anonymous Simple Authentication and Security Layer (SASL) MechanismK. Zeilenga | Proposed Standard | June 2006 |
| 4506 | XDR: External Data Representation StandardM. Eisler, Ed. | Internet Standard | May 2006 |
| 4507 | Transport Layer Security (TLS) Session Resumption without Server-Side StateJ. Salowey, H. Zhou, P. Eronen, H. Tschofenig · obsoleted by RFC 5077 | Proposed Standard | May 2006 |
| 4508 | Conveying Feature Tags with the Session Initiation Protocol (SIP) REFER MethodO. Levin, A. Johnston | Proposed Standard | May 2006 |
| 4509 | Use of SHA-256 in DNSSEC Delegation Signer (DS) Resource Records (RRs)W. Hardaker | Proposed Standard | May 2006 |
| 4510 | Lightweight Directory Access Protocol (LDAP): Technical Specification Road MapK. Zeilenga, Ed. | Proposed Standard | June 2006 |
| 4511 | Lightweight Directory Access Protocol (LDAP): The ProtocolJ. Sermersheim, Ed. | Proposed Standard | June 2006 |
| 4512 | Lightweight Directory Access Protocol (LDAP): Directory Information ModelsK. Zeilenga, Ed. | Proposed Standard | June 2006 |
| 4513 | Lightweight Directory Access Protocol (LDAP): Authentication Methods and Security MechanismsR. Harrison, Ed. | Proposed Standard | June 2006 |
| 4514 | Lightweight Directory Access Protocol (LDAP): String Representation of Distinguished NamesK. Zeilenga, Ed. | Proposed Standard | June 2006 |
| 4515 | Lightweight Directory Access Protocol (LDAP): String Representation of Search FiltersM. Smith, Ed., T. Howes | Proposed Standard | June 2006 |
| 4516 | Lightweight Directory Access Protocol (LDAP): Uniform Resource LocatorM. Smith, Ed., T. Howes | Proposed Standard | June 2006 |
| 4517 | Lightweight Directory Access Protocol (LDAP): Syntaxes and Matching RulesS. Legg, Ed. | Proposed Standard | June 2006 |
| 4518 | Lightweight Directory Access Protocol (LDAP): Internationalized String PreparationK. Zeilenga | Proposed Standard | June 2006 |
| 4519 | Lightweight Directory Access Protocol (LDAP): Schema for User ApplicationsA. Sciberras, Ed. | Proposed Standard | June 2006 |
| 4520 | Internet Assigned Numbers Authority (IANA) Considerations for the Lightweight Directory Access Protocol (LDAP)K. Zeilenga | Best Current Practice | June 2006 |
| 4521 | Considerations for Lightweight Directory Access Protocol (LDAP) ExtensionsK. Zeilenga | Best Current Practice | June 2006 |
| 4522 | Lightweight Directory Access Protocol (LDAP): The Binary Encoding OptionS. Legg | Proposed Standard | June 2006 |
| 4523 | Lightweight Directory Access Protocol (LDAP) Schema Definitions for X.509 CertificatesK. Zeilenga | Proposed Standard | June 2006 |
| 4524 | COSINE LDAP/X.500 SchemaK. Zeilenga, Ed. | Proposed Standard | June 2006 |
| 4525 | Lightweight Directory Access Protocol (LDAP) Modify-Increment ExtensionK. Zeilenga | Informational | June 2006 |
| 4526 | Lightweight Directory Access Protocol (LDAP) Absolute True and False FiltersK. Zeilenga | Proposed Standard | June 2006 |
| 4527 | Lightweight Directory Access Protocol (LDAP) Read Entry ControlsK. Zeilenga | Proposed Standard | June 2006 |
| 4528 | Lightweight Directory Access Protocol (LDAP) Assertion ControlK. Zeilenga | Proposed Standard | June 2006 |
| 4529 | Requesting Attributes by Object Class in the Lightweight Directory Access ProtocolK. Zeilenga | Informational | June 2006 |
| 4530 | Lightweight Directory Access Protocol (LDAP) entryUUID Operational AttributeK. Zeilenga | Proposed Standard | June 2006 |
| 4531 | Lightweight Directory Access Protocol (LDAP) Turn OperationK. Zeilenga | Experimental | June 2006 |
| 4532 | Lightweight Directory Access Protocol (LDAP) "Who am I?" OperationK. Zeilenga | Proposed Standard | June 2006 |
| 4533 | The Lightweight Directory Access Protocol (LDAP) Content Synchronization OperationK. Zeilenga, J.H. Choi | Experimental | June 2006 |
| 4534 | Group Security Policy Token v1A. Colegrove, H. Harney | Proposed Standard | June 2006 |
| 4535 | GSAKMP: Group Secure Association Key Management ProtocolH. Harney, U. Meth, A. Colegrove, G. Gross | Proposed Standard | June 2006 |
| 4536 | The application/smil and application/smil+xml Media TypesP. Hoschka | Informational | July 2006 |
| 4537 | Kerberos Cryptosystem Negotiation ExtensionL. Zhu, P. Leach, K. Jaganathan | Proposed Standard | June 2006 |
| 4538 | Request Authorization through Dialog Identification in the Session Initiation Protocol (SIP)J. Rosenberg | Proposed Standard | June 2006 |
| 4539 | Media Type Registration for the Society of Motion Picture and Television Engineers (SMPTE) Material Exchange Format (MXF)T. Edwards | Informational | May 2006 |
| 4540 | NEC's Simple Middlebox Configuration (SIMCO) Protocol Version 3.0M. Stiemerling, J. Quittek, C. Cadar | Experimental | May 2006 |
| 4541 | Considerations for Internet Group Management Protocol (IGMP) and Multicast Listener Discovery (MLD) Snooping SwitchesM. Christensen, K. Kimball, F. Solensky | Informational | May 2006 |
| 4542 | Implementing an Emergency Telecommunications Service (ETS) for Real-Time Services in the Internet Protocol SuiteF. Baker, J. Polk | Informational | May 2006 |
| 4543 | The Use of Galois Message Authentication Code (GMAC) in IPsec ESP and AHD. McGrew, J. Viega | Proposed Standard | May 2006 |
| 4544 | Definitions of Managed Objects for Internet Small Computer System Interface (iSCSI)M. Bakke, M. Krueger, T. McSweeney, J. Muchow · obsoleted by RFC 7147 | Proposed Standard | May 2006 |
| 4545 | Definitions of Managed Objects for IP Storage User Identity AuthorizationM. Bakke, J. Muchow | Proposed Standard | May 2006 |
| 4546 | Radio Frequency (RF) Interface Management Information Base for Data over Cable Service Interface Specifications (DOCSIS) 2.0 Compliant RF InterfacesD. Raftus, E. Cardona | Proposed Standard | June 2006 |
| 4547 | Event Notification Management Information Base for Data over Cable Service Interface Specifications (DOCSIS)-Compliant Cable Modems and Cable Modem Termination SystemsA. Ahmad, G. Nakanishi | Proposed Standard | June 2006 |
| 4548 | Internet Code Point (ICP) Assignments for NSAP AddressesE. Gray, J. Rutemiller, G. Swallow | Proposed Standard | May 2006 |
| 4549 | Synchronization Operations for Disconnected IMAP4 ClientsA. Melnikov, Ed. | Informational | June 2006 |
| 4550 | Internet Email to Support Diverse Service Environments (Lemonade) ProfileS. Maes, A. Melnikov · obsoleted by RFC 5550 | Proposed Standard | June 2006 |
| 4551 | IMAP Extension for Conditional STORE Operation or Quick Flag Changes ResynchronizationA. Melnikov, S. Hole · obsoleted by RFC 7162 | Proposed Standard | June 2006 |
| 4552 | Authentication/Confidentiality for OSPFv3M. Gupta, N. Melam | Proposed Standard | June 2006 |
| 4553 | Structure-Agnostic Time Division Multiplexing (TDM) over Packet (SAToP)A. Vainshtein, Ed., YJ. Stein, Ed. | Proposed Standard | June 2006 |
| 4554 | Use of VLANs for IPv4-IPv6 Coexistence in Enterprise NetworksT. Chown | Informational | June 2006 |