An Offer/Answer Model with Session Description Protocol
RFC 3264, “An Offer/Answer Model with Session Description Protocol”, is a Proposed Standard document published in July 2002 by J. Rosenberg, H. Schulzrinne. It obsoletes RFC 2543. It has since been updated by RFC 6157, RFC 8843, RFC 9143. The canonical text is published by the RFC Editor.
Abstract
This document defines a mechanism by which two entities can make use of the Session Description Protocol (SDP) to arrive at a common view of a multimedia session between them. In the model, one participant offers the other a description of the desired session from their perspective, and the other participant answers with the desired session from their perspective. This offer/answer model is most useful in unicast sessions where information from both participants is needed for the complete view of the session. The offer/answer model is used by protocols like the Session Initiation Protocol (SIP). [STANDARDS-TRACK]
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
The canonical text of RFC 3264 is hosted at rfc-editor.org. Available in TXT,HTML.
- RFC 3263 Session Initiation Protocol : Locating SIP Servers
- RFC 3265 Session Initiation Protocol -Specific Event Notification
- RFC 3262 Reliability of Provisional Responses in Session Initiation Protocol
- RFC 3266 Support for IPv6 in Session Description Protocol
- RFC 3261 SIP: Session Initiation Protocol
- RFC 3267 Real-Time Transport Protocol Payload Format and File Storage Format for the Adaptive Multi-Rate and Adaptive Multi-Rate Wideband Audio Codecs
- RFC 3260 New Terminology and Clarifications for Diffserv
- RFC 3268 Advanced Encryption Standard Ciphersuites for Transport Layer Security