RFC - 3264

An Offer/Answer Model with the Session Description Protocol (SDP)

Original:	ftp://ftp.isi.edu/in-notes/rfc3264.txt
Authors:	J. Rosenberg [dynamicsoft], H. Schulzrinne [Columbia U.]
Date:	June 2002
Category:	Proposed Standard

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Obsoletes:
RFC-2543	SIP: Session Initiation Protocol (Obsoleted by RFC-3261prop, RFC-3263prop, RFC-3262prop, RFC-3265prop, RFC-3264prop)

Referred by:	62 RFC
Refers to:	10 RFC

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Status

This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this protocol. Distribution of this memo is unlimited.

Copyright Notice

Copyright (C) The Internet Society (2002). All Rights Reserved.

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).

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