RFC 3901: DNS IPv6 Transport Operational Guidelines. RFC 3902: The "application/soap+xml" media type. RFC 3903: Session Initiation Protocol (SIP) Extension for Event State Publication. RFC 3904: Evaluation of IPv6 Transition Mechanisms for Unmanaged Networks. RFC 3905: A Template for IETF Patent Disclosures and Licensing Declarations. RFC 3906: Calculating Interior Gateway Protocol (IGP) Routes Over Traffic Engineering Tunnels. RFC 3909: Lightweight Directory Access Protocol (LDAP) Cancel Operation. RFC 3910: The SPIRITS (Services in PSTN requesting Internet Services) Protocol. RFC 3911: The Session Initiation Protocol (SIP) "Join" Header. RFC 3912: WHOIS Protocol Specification. RFC 3913: Border Gateway Multicast Protocol (BGMP): Protocol Specification. RFC 3914: Open Pluggable Edge Services (OPES) Treatment of IAB Considerations. RFC 3915: Domain Registry Grace Period Mapping for the Extensible Provisioning Protocol (EPP). RFC 3916: Requirements for Pseudo-Wire Emulation Edge-to-Edge (PWE3). RFC 3917: Requirements for IP Flow Information Export (IPFIX). RFC 3918: Methodology for IP Multicast Benchmarking. RFC 3919: Remote Network Monitoring (RMON) Protocol Identifiers for IPv6 and Multi Protocol Label Switching (MPLS). RFC 3920: Extensible Messaging and Presence Protocol (XMPP): Core. RFC 3921: Extensible Messaging and Presence Protocol (XMPP): Instant Messaging and Presence. RFC 3922: Mapping the Extensible Messaging and Presence Protocol (XMPP) to Common Presence and Instant Messaging (CPIM). RFC 3923: End-to-End Signing and Object Encryption for the Extensible Messaging and Presence Protocol (XMPP). RFC 3924: Cisco Architecture for Lawful Intercept in IP Networks. RFC 3925: Vendor-Identifying Vendor Options for Dynamic Host Configuration Protocol version 4 (DHCPv4). RFC 3926: FLUTE - File Delivery over Unidirectional Transport. RFC 3927: Dynamic Configuration of IPv4 Link-Local Addresses. RFC 3928: Lightweight Directory Access Protocol (LDAP) Client Update Protocol (LCUP). RFC 3929: Alternative Decision Making Processes for Consensus-Blocked Decisions in the IETF. RFC 3930: The Protocol versus Document Points of View in Computer Protocols. RFC 3931: Layer Two Tunneling Protocol - Version 3 (L2TPv3). RFC 3932: The IESG and RFC Editor Documents: Procedures. RFC 3933: A Model for IETF Process Experiments. RFC 3934: Updates to RFC 2418 Regarding the Management of IETF Mailing Lists. RFC 3935: A Mission Statement for the IETF. RFC 3936: Procedures for Modifying the Resource reSerVation Protocol (RSVP). RFC 3937: A Uniform Resource Name (URN) Namespace for the International Press Telecommunications Council (IPTC). RFC 3938: Video-Message Message-Context. RFC 3939: Calling Line Identification for Voice Mail Messages. RFC 3940: Negative-acknowledgment (NACK)-Oriented Reliable Multicast (NORM) Protocol. RFC 3941: Negative-Acknowledgment (NACK)-Oriented Reliable Multicast (NORM) Building Blocks. RFC 3942: Reclassifying Dynamic Host Configuration Protocol version 4 (DHCPv4) Options. RFC 3943: Transport Layer Security (TLS) Protocol Compression Using Lempel-Ziv-Stac (LZS). RFC 3944: H.350 Directory Services. RFC 3945: Generalized Multi-Protocol Label Switching (GMPLS) Architecture. RFC 3946: Generalized Multi-Protocol Label Switching (GMPLS) Extensions for Synchronous Optical Network (SONET) and Synchronous Digital Hierarchy (SDH) Control. RFC 3947: Negotiation of NAT-Traversal in the IKE. RFC 3948: UDP Encapsulation of IPsec ESP Packets. RFC 3949: File Format for Internet Fax. RFC 3950: Tag Image File Format Fax eXtended (TIFF-FX) - image/tiff-fx MIME Sub-type Registration. RFC 3951: Internet Low Bit Rate Codec (iLBC). RFC 3952: Real-time Transport Protocol (RTP) Payload Format for internet Low Bit Rate Codec (iLBC) Speech. RFC 3953: Telephone Number Mapping (ENUM) Service Registration for Presence Services. RFC 3954: Cisco Systems NetFlow Services Export Version 9. RFC 3955: Evaluation of Candidate Protocols for IP Flow Information Export (IPFIX). RFC 3956: Embedding the Rendezvous Point (RP) Address in an IPv6 Multicast Address. RFC 3957: Authentication, Authorization, and Accounting (AAA) Registration Keys for Mobile IPv4. RFC 3958: Domain-Based Application Service Location Using SRV RRs and the Dynamic Delegation Discovery Service (DDDS). RFC 3959: The Early Session Disposition Type for the Session Initiation Protocol (SIP). RFC 3960: Early Media and Ringing Tone Generation in the Session Initiation Protocol (SIP). RFC 3961: Encryption and Checksum Specifications for Kerberos 5. RFC 3962: Advanced Encryption Standard (AES) Encryption for Kerberos 5. RFC 3963: Network Mobility (NEMO) Basic Support Protocol. RFC 3964: Security Considerations for 6to4. RFC 3965: A Simple Mode of Facsimile Using Internet Mail. RFC 3966: The tel URI for Telephone Numbers. RFC 3967: Clarifying when Standards Track Documents may Refer Normatively to Documents at a Lower Level. RFC 3968: The Internet Assigned Number Authority (IANA) Header Field Parameter Registry for the Session Initiation Protocol (SIP). RFC 3969: The Internet Assigned Number Authority (IANA) Uniform Resource Identifier (URI) Parameter Registry for the Session Initiation Protocol (SIP). RFC 3970: A Traffic Engineering (TE) MIB. RFC 3971: SEcure Neighbor Discovery (SEND). RFC 3972: Cryptographically Generated Addresses (CGA). RFC 3973: Protocol Independent Multicast - Dense Mode (PIM-DM): Protocol Specification (Revised). RFC 3974: SMTP Operational Experience in Mixed IPv4/v6 Environments. RFC 3975: OMA-IETF Standardization Collaboration. RFC 3976: Interworking SIP and Intelligent Network (IN) Applications. RFC 3977: Network News Transfer Protocol (NNTP). RFC 3978: IETF Rights in Contributions. RFC 3979: Intellectual Property Rights in IETF Technology. RFC 3980: T11 Network Address Authority (NAA) Naming Format for iSCSI Node Names. RFC 3981: IRIS: The Internet Registry Information Service (IRIS) Core Protocol. RFC 3982: IRIS: A Domain Registry (dreg) Type for the Internet Registry Information Service (IRIS). RFC 3983: Using the Internet Registry Information Service (IRIS) over the Blocks Extensible Exchange Protocol (BEEP). RFC 3984: RTP Payload Format for H.264 Video. RFC 3985: Pseudo Wire Emulation Edge-to-Edge (PWE3) Architecture. RFC 3986: Uniform Resource Identifier (URI): Generic Syntax. RFC 3987: Internationalized Resource Identifiers (IRIs). RFC 3988: Maximum Transmission Unit Signalling Extensions for the Label Distribution Protocol. RFC 3989: Middlebox Communications (MIDCOM) Protocol Semantics. RFC 3990: Configuration and Provisioning for Wireless Access Points (CAPWAP) Problem Statement. RFC 3991: Media Gateway Control Protocol (MGCP) Redirect and Reset Package. RFC 3992: Media Gateway Control Protocol (MGCP) Lockstep State Reporting Mechanism. RFC 3993: Subscriber-ID Suboption for the Dynamic Host Configuration Protocol (DHCP) Relay Agent Option. RFC 3994: Indication of Message Composition for Instant Messaging. RFC 3995: Internet Printing Protocol (IPP): Event Notifications and Subscriptions. RFC 3996: Internet Printing Protocol (IPP): The 'ippget' Delivery Method for Event Notifications. RFC 3997: Internet Printing Protocol (IPP): Requirements for IPP Notifications. RFC 3998: Internet Printing Protocol (IPP): Job and Printer Administrative Operations. RFC 4001: Textual Conventions for Internet Network Addresses. RFC 4002: IANA Registration for Enumservice 'web' and 'ft'. RFC 4003: GMPLS Signaling Procedure for Egress Control. RFC 4004: Diameter Mobile IPv4 Application. RFC 4005: Diameter Network Access Server Application. RFC 4006: Diameter Credit-Control Application. RFC 4007: IPv6 Scoped Address Architecture. RFC 4008: Definitions of Managed Objects for Network Address Translators (NAT). RFC 4009: The SEED Encryption Algorithm. RFC 4010: Use of the SEED Encryption Algorithm in Cryptographic Message Syntax (CMS). RFC 4011: Policy Based Management MIB. RFC 4012: Routing Policy Specification Language next generation (RPSLng). RFC 4013: SASLprep: Stringprep Profile for User Names and Passwords. RFC 4014: Remote Authentication Dial-In User Service (RADIUS) Attributes Suboption for the Dynamic Host Configuration Protocol (DHCP) Relay Agent Information Option. RFC 4015: The Eifel Response Algorithm for TCP. RFC 4016: Protocol for Carrying Authentication and Network Access (PANA) Threat Analysis and Security Requirements. RFC 4017: Extensible Authentication Protocol (EAP) Method Requirements for Wireless LANs. RFC 4018: Finding Internet Small Computer Systems Interface (iSCSI) Targets and Name Servers by Using Service Location Protocol version 2 (SLPv2). RFC 4019: RObust Header Compression (ROHC): Profiles for User Datagram Protocol (UDP) Lite. RFC 4020: Early IANA Allocation of Standards Track Code Points. RFC 4021: Registration of Mail and MIME Header Fields. RFC 4022: Management Information Base for the Transmission Control Protocol (TCP). RFC 4023: Encapsulating MPLS in IP or Generic Routing Encapsulation (GRE). RFC 4024: Voice Messaging Client Behaviour. RFC 4025: A Method for Storing IPsec Keying Material in DNS. RFC 4026: Provider Provisioned Virtual Private Network (VPN) Terminology. RFC 4027: Domain Name System Media Types. RFC 4028: Session Timers in the Session Initiation Protocol (SIP). RFC 4029: Scenarios and Analysis for Introducing IPv6 into ISP Networks. RFC 4030: The Authentication Suboption for the Dynamic Host Configuration Protocol (DHCP) Relay Agent Option. RFC 4031: Service Requirements for Layer 3 Provider Provisioned Virtual Private Networks (PPVPNs). RFC 4032: Update to the Session Initiation Protocol (SIP) Preconditions Framework. RFC 4033: DNS Security Introduction and Requirements. RFC 4034: Resource Records for the DNS Security Extensions. RFC 4035: Protocol Modifications for the DNS Security Extensions. RFC 4036: Management Information Base for Data Over Cable Service Interface Specification (DOCSIS) Cable Modem Termination Systems for Subscriber Management. RFC 4037: Open Pluggable Edge Services (OPES) Callout Protocol (OCP) Core. RFC 4038: Application Aspects of IPv6 Transition. RFC 4039: Rapid Commit Option for the Dynamic Host Configuration Protocol version 4 (DHCPv4). RFC 4040: RTP Payload Format for a 64 kbit/s Transparent Call. RFC 4041: Requirements for Morality Sections in Routing Area Drafts. RFC 4042: UTF-9 and UTF-18 Efficient Transformation Formats of Unicode. RFC 4043: Internet X.509 Public Key Infrastructure Permanent Identifier. RFC 4044: Fibre Channel Management MIB. RFC 4045: Extensions to Support Efficient Carrying of Multicast Traffic in Layer-2 Tunneling Protocol (L2TP). RFC 4046: Multicast Security (MSEC) Group Key Management Architecture. RFC 4047: MIME Sub-type Registrations for Flexible Image Transport System (FITS). RFC 4048: RFC 1888 Is Obsolete. RFC 4049: BinaryTime: An Alternate Format for Representing Date and Time in ASN.1. RFC 4050: Using the Elliptic Curve Signature Algorithm (ECDSA) for XML Digital Signatures. RFC 4051: Additional XML Security Uniform Resource Identifiers (URIs). RFC 4052: IAB Processes for Management of IETF Liaison Relationships. RFC 4053: Procedures for Handling Liaison Statements to and from the IETF. RFC 4054: Impairments and Other Constraints on Optical Layer Routing. RFC 4055: Additional Algorithms and Identifiers for RSA Cryptography for use in the Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) Profile. RFC 4056: Use of the RSASSA-PSS Signature Algorithm in Cryptographic Message Syntax (CMS). RFC 4057: IPv6 Enterprise Network Scenarios. RFC 4058: Protocol for Carrying Authentication for Network Access (PANA) Requirements. RFC 4059: Internet X.509 Public Key Infrastructure Warranty Certificate Extension. RFC 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 Encoding. RFC 4061: Benchmarking Basic OSPF Single Router Control Plane Convergence. RFC 4062: OSPF Benchmarking Terminology and Concepts. RFC 4063: Considerations When Using Basic OSPF Convergence Benchmarks. RFC 4064: Experimental Message, Extensions, and Error Codes for Mobile IPv4. RFC 4065: Instructions for Seamoby and Experimental Mobility Protocol IANA Allocations. RFC 4066: Candidate Access Router Discovery (CARD). RFC 4067: Context Transfer Protocol (CXTP). RFC 4068: Fast Handovers for Mobile IPv6. RFC 4069: Definitions of Managed Object Extensions for Very High Speed Digital Subscriber Lines (VDSL) Using Single Carrier Modulation (SCM) Line Coding. RFC 4070: Definitions of Managed Object Extensions for Very High Speed Digital Subscriber Lines (VDSL) Using Multiple Carrier Modulation (MCM) Line Coding. RFC 4071: Structure of the IETF Administrative Support Activity (IASA). RFC 4072: Diameter Extensible Authentication Protocol (EAP) Application. RFC 4073: Protecting Multiple Contents with the Cryptographic Message Syntax (CMS). RFC 4074: Common Misbehavior Against DNS Queries for IPv6 Addresses. RFC 4075: Simple Network Time Protocol (SNTP) Configuration Option for DHCPv6. RFC 4076: Renumbering Requirements for Stateless Dynamic Host Configuration Protocol for IPv6 (DHCPv6). RFC 4077: A Negative Acknowledgement Mechanism for Signaling Compression. RFC 4078: The TV-Anytime Content Reference Identifier (CRID). RFC 4079: A Presence Architecture for the Distribution of GEOPRIV Location Objects. RFC 4080: Next Steps in Signaling (NSIS): Framework. RFC 4081: Security Threats for Next Steps in Signaling (NSIS). RFC 4082: Timed Efficient Stream Loss-Tolerant Authentication (TESLA): Multicast Source Authentication Transform Introduction. RFC 4083: Input 3rd-Generation Partnership Project (3GPP) Release 5 Requirements on the Session Initiation Protocol (SIP). RFC 4084: Terminology for Describing Internet Connectivity. RFC 4085: Embedding Globally-Routable Internet Addresses Considered Harmful. RFC 4086: Randomness Requirements for Security. RFC 4087: IP Tunnel MIB. RFC 4088: Uniform Resource Identifier (URI) Scheme for the Simple Network Management Protocol (SNMP). RFC 4089: IAB and IESG Recommendation for IETF Administrative Restructuring. RFC 4090: Fast Reroute Extensions to RSVP-TE for LSP Tunnels. RFC 4091: The Alternative Network Address Types (ANAT) Semantics for the Session Description Protocol (SDP) Grouping Framework. RFC 4092: Usage of the Session Description Protocol (SDP) Alternative Network Address Types (ANAT) Semantics in the Session Initiation Protocol (SIP). RFC 4093: Problem Statement: Mobile IPv4 Traversal of Virtual Private Network (VPN) Gateways. RFC 4094: Analysis of Existing Quality-of-Service Signaling Protocols. RFC 4095: Attaching Meaning to Solicitation Class Keywords. RFC 4096: Policy-Mandated Labels Such as "Adv:" in Email Subject Headers Considered Ineffective At Best. RFC 4097: Middlebox Communications (MIDCOM) Protocol Evaluation. RFC 4098: Terminology for Benchmarking BGP Device Convergence in the Control Plane. RFC 4101: Writing Protocol Models. RFC 4102: Registration of the text/red MIME Sub-Type. RFC 4103: RTP Payload for Text Conversation. RFC 4104: Policy Core Extension Lightweight Directory Access Protocol Schema (PCELS). RFC 4105: Requirements for Inter-Area MPLS Traffic Engineering. RFC 4106: The Use of Galois/Counter Mode (GCM) in IPsec Encapsulating Security Payload (ESP). RFC 4107: Guidelines for Cryptographic Key Management. RFC 4108: Using Cryptographic Message Syntax (CMS) to Protect Firmware Packages. RFC 4109: Algorithms for Internet Key Exchange version 1 (IKEv1). RFC 4110: A Framework for Layer 3 Provider-Provisioned Virtual Private Networks (PPVPNs). RFC 4111: Security Framework for Provider-Provisioned Virtual Private Networks (PPVPNs). RFC 4112: Electronic Commerce Modeling Language (ECML) Version 2 Specification. RFC 4113: Management Information Base for the User Datagram Protocol (UDP). RFC 4114: E.164 Number Mapping for the Extensible Provisioning Protocol (EPP). RFC 4115: A Differentiated Service Two-Rate, Three-Color Marker with Efficient Handling of in-Profile Traffic. RFC 4116: IPv4 Multihoming Practices and Limitations. RFC 4117: Transcoding Services Invocation in the Session Initiation Protocol (SIP) Using Third Party Call Control (3pcc). RFC 4118: Architecture Taxonomy for Control and Provisioning of Wireless Access Points (CAPWAP). RFC 4119: A Presence-based GEOPRIV Location Object Format. RFC 4120: The Kerberos Network Authentication Service (V5). RFC 4121: The Kerberos Version 5 Generic Security Service Application Program Interface (GSS-API) Mechanism: Version 2. RFC 4122: A Universally Unique IDentifier (UUID) URN Namespace. RFC 4123: Session Initiation Protocol (SIP)-H.323 Interworking Requirements. RFC 4124: Protocol Extensions for Support of Diffserv-aware MPLS Traffic Engineering. RFC 4125: Maximum Allocation Bandwidth Constraints Model for Diffserv-aware MPLS Traffic Engineering. RFC 4126: Max Allocation with Reservation Bandwidth Constraints Model for Diffserv-aware MPLS Traffic Engineering & Performance Comparisons. RFC 4127: Russian Dolls Bandwidth Constraints Model for Diffserv-aware MPLS Traffic Engineering. RFC 4128: Bandwidth Constraints Models for Differentiated Services (Diffserv)-aware MPLS Traffic Engineering: Performance Evaluation. RFC 4129: Digital Private Network Signaling System (DPNSS)/Digital Access Signaling System 2 (DASS 2) Extensions to the IUA Protocol. RFC 4130: MIME-Based Secure Peer-to-Peer Business Data Interchange Using HTTP, Applicability Statement 2 (AS2). RFC 4131: Management Information Base for Data Over Cable Service Interface Specification (DOCSIS) Cable Modems and Cable Modem Termination Systems for Baseline Privacy Plus. RFC 4132: Addition of Camellia Cipher Suites to Transport Layer Security (TLS). RFC 4133: Entity MIB (Version 3). RFC 4134: Examples of S/MIME Messages. RFC 4135: Goals of Detecting Network Attachment in IPv6. RFC 4136: OSPF Refresh and Flooding Reduction in Stable Topologies. RFC 4137: State Machines for Extensible Authentication Protocol (EAP) Peer and Authenticator. RFC 4138: Forward RTO-Recovery (F-RTO): An Algorithm for Detecting Spurious Retransmission Timeouts with TCP and the Stream Control Transmission Protocol (SCTP). RFC 4139: Requirements for Generalized MPLS (GMPLS) Signaling Usage and Extensions for Automatically Switched Optical Network (ASON). RFC 4140: Hierarchical Mobile IPv6 Mobility Management (HMIPv6). RFC 4141: SMTP and MIME Extensions for Content Conversion. RFC 4142: Full-mode Fax Profile for Internet Mail (FFPIM). RFC 4143: Facsimile Using Internet Mail (IFAX) Service of ENUM. RFC 4144: How to Gain Prominence and Influence in Standards Organizations. RFC 4145: TCP-Based Media Transport in the Session Description Protocol (SDP). RFC 4146: Simple New Mail Notification. RFC 4147: Proposed Changes to the Format of the IANA IPv6 Registry. RFC 4148: IP Performance Metrics (IPPM) Metrics Registry. RFC 4149: Definition of Managed Objects for Synthetic Sources for Performance Monitoring Algorithms. RFC 4150: Transport Performance Metrics MIB. RFC 4151: The 'tag' URI Scheme. RFC 4152: A Uniform Resource Name (URN) Namespace for the Common Language Equipment Identifier (CLEI) Code. RFC 4153: XML Voucher: Generic Voucher Language. RFC 4154: Voucher Trading System Application Programming Interface (VTS-API). RFC 4155: The application/mbox Media Type. RFC 4156: The wais URI Scheme. RFC 4157: The prospero URI Scheme. RFC 4158: Internet X.509 Public Key Infrastructure: Certification Path Building. RFC 4159: Deprecation of "ip6.int". RFC 4160: Internet Fax Gateway Requirements. RFC 4161: Guidelines for Optional Services for Internet Fax Gateways. RFC 4162: Addition of SEED Cipher Suites to Transport Layer Security (TLS). RFC 4163: RObust Header Compression (ROHC): Requirements on TCP/IP Header Compression. RFC 4164: RObust Header Compression (ROHC): Context Replication for ROHC Profiles. RFC 4165: Signaling System 7 (SS7) Message Transfer Part 2 (MTP2) - User Peer-to-Peer Adaptation Layer (M2PA). RFC 4166: Telephony Signalling Transport over Stream Control Transmission Protocol (SCTP) Applicability Statement. RFC 4167: Graceful OSPF Restart Implementation Report. RFC 4168: The Stream Control Transmission Protocol (SCTP) as a Transport for the Session Initiation Protocol (SIP). RFC 4169: Hypertext Transfer Protocol (HTTP) Digest Authentication Using Authentication and Key Agreement (AKA) Version-2. RFC 4170: Tunneling Multiplexed Compressed RTP (TCRTP). RFC 4171: Internet Storage Name Service (iSNS). RFC 4172: iFCP - A Protocol for Internet Fibre Channel Storage Networking. RFC 4173: Bootstrapping Clients using the Internet Small Computer System Interface (iSCSI) Protocol. RFC 4174: The IPv4 Dynamic Host Configuration Protocol (DHCP) Option for the Internet Storage Name Service. RFC 4175: RTP Payload Format for Uncompressed Video. RFC 4176: Framework for Layer 3 Virtual Private Networks (L3VPN) Operations and Management. RFC 4177: Architectural Approaches to Multi-homing for IPv6. RFC 4178: The Simple and Protected Generic Security Service Application Program Interface (GSS-API) Negotiation Mechanism. RFC 4179: Using Universal Content Identifier (UCI) as Uniform Resource Names (URN). RFC 4180: Common Format and MIME Type for Comma-Separated Values (CSV) Files. RFC 4181: Guidelines for Authors and Reviewers of MIB Documents. RFC 4182: Removing a Restriction on the use of MPLS Explicit NULL. RFC 4183: A Suggested Scheme for DNS Resolution of Networks and Gateways. RFC 4184: RTP Payload Format for AC-3 Audio. RFC 4185: National and Local Characters for DNS Top Level Domain (TLD) Names. RFC 4186: Extensible Authentication Protocol Method for Global System for Mobile Communications (GSM) Subscriber Identity Modules (EAP-SIM). RFC 4187: Extensible Authentication Protocol Method for 3rd Generation Authentication and Key Agreement (EAP-AKA). RFC 4188: Definitions of Managed Objects for Bridges. RFC 4189: Requirements for End-to-Middle Security for the Session Initiation Protocol (SIP). RFC 4190: Framework for Supporting Emergency Telecommunications Service (ETS) in IP Telephony. RFC 4191: Default Router Preferences and More-Specific Routes. RFC 4192: Procedures for Renumbering an IPv6 Network without a Flag Day. RFC 4193: Unique Local IPv6 Unicast Addresses. RFC 4194: The S Hexdump Format. RFC 4195: A Uniform Resource Name (URN) Namespace for the TV-Anytime Forum. RFC 4196: The SEED Cipher Algorithm and Its Use with IPsec. RFC 4197: Requirements for Edge-to-Edge Emulation of Time Division Multiplexed (TDM) Circuits over Packet Switching Networks. RFC 4198: A Uniform Resource Name (URN) Namespace for Federated Content.