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Session Announcement Protocol

The Session Announcement Protocol (SAP) is an experimental protocol for advertising multicast session information. SAP typically uses Session Description Protocol (SDP) as the format for Real-time Transport Protocol (RTP) session descriptions. Announcement data is sent using IP multicast and the User Datagram Protocol (UDP).

Under SAP, senders periodically transmit SDP descriptions to a well-known multicast address and port number (9875).[1] A listening application constructs a guide of all advertised multicast sessions.

SAP was published by the IETF as RFC 2974.[2]

  1. ^ "SAP (v1 & v2): Session Announcement Protocol". Archived from the original on 2013-01-26. Retrieved 2012-04-06.
  2. ^ M. Handley; C. Perkins; E. Whelan (October 2000). Session Announcement Protocol. RFC 2974.

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