Title: An Offer/Answer Model with Session Description Protocol (SDP)
Author(s): J. Rosenberg, H. Schulzrinne.
Status: PROPOSED STANDARD
Date: Jun 2002
Length: 60854
Obsoletes: RFC2543
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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