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Topic: Session Announcement Protocol

Related Topics

Session Description Protocol

Internet Protocol

Transport layer

Electronic Numbering

SIP

Voice over IP

RTP

IETF

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	RFC 2974 (rfc2974) - Session Announcement Protocol
		The announcement is multicast with the same scope as the session it is announcing, ensuring that the recipients of the announcement are within the scope of the session the announcement describes (bandwidth and other such constraints permitting).
		A SAP announcement is multicast with the same scope as the session it is announcing, ensuring that the recipients of the announcement are within the scope of the session the announcement describes.
		Session announcements that are encrypted with a symmetric algorithm may allow a degree of privacy in the announcement of a session, but it should be recognized that a user in possession of such a key can pass it on to other users who should not be in possession of such a key.
	www.faqs.org /rfcs/rfc2974.html (4777 words)

	RFC 2327 (rfc2327) - SDP: Session Description Protocol
		Session Announcement A session announcement is a mechanism by which a session description is conveyed to users in a proactive fashion, i.e., the session description was not explicitly requested by the user.
		SAP provides both encryption and authentication mechanisms but due to the nature of session announcements it is likely that there are many occasions where the originator of a session announcement cannot be authenticated because they are previously unknown to the receiver of the announcement and because no common public key infrastructure is available.
		Session descriptions may be parsed at intermediate systems such as firewalls for the purposes of opening a hole in the firewall to allow the participation in multimedia sessions.
	www.faqs.org /rfcs/rfc2327.html (9606 words)

	Session Announcement Protocol - Wikipedia, the free encyclopedia
		The Session Announcement Protocol (SAP) is a protocol for broadcasting multicast session information.
		SAP was published by the IETF as RFC 2974.
		SAP typically uses session description protocol (SDP) as the format of the session descriptions, and the multicast sessions typically use Real-time Transport Protocol (RTP).
	en.wikipedia.org /wiki/Session_Announcement_Protocol (101 words)

	RFC (Request for Comments) 2974 (Site not responding. Last check: 2007-10-04)
		Experimental [Page 3] RFC 2974 Session Announcement Protocol October 2000 3.1 Announcement Interval The time period between repetitions of an announcement is chosen such that the total bandwidth used by all announcements on a single SAP group remains below a preconfigured limit.
		Experimental [Page 4] RFC 2974 Session Announcement Protocol October 2000 4 Session Deletion Sessions may be deleted in one of several ways: Explicit Timeout The session description payload may contain timestamp information specifying the start- and end-times of the session.
		Experimental [Page 10] RFC 2974 Session Announcement Protocol October 2000 Clearly the key used for the authentication should not be trusted to belong to the session originator unless it has been separately authenticated by some other means, such as being certified by a trusted third party.
	www.rfc.ok.cl /rfc.nkt/2974 (4921 words)

	SAP (SAPv1 & SAPv2): Session Announcement Protocol Overview (RFC 2974)
		Session Announcement Protocol (SAP) is an announcement protocol that is used to assist the advertisement of multicast multimedia conferences and other multicast sessions, and to communicate the relevant session setup information to prospective participants.
		The announcement is multicast with the same scope as the session it is announcing, ensuring that the recipients of the announcement can also be potential recipients of the session the announcement describes (bandwidth and other such constraints permitting).
		A SAP listener learns of the multicast scopes it is within (for example, using the Multicast-Scope Zone Announcement Protocol) and listens on the well known SAP address and port for those scopes.
	javvin.biz /protocolSAP.html (559 words)

	SAP
		SAP was published by the IETF as RFC 2974 (http://www.ietf.org/rfc/rfc2974.txt).
		SAP typically uses SDP as the format of the session descriptions, and the multicast sessions typically use RTP.
		SAP (http://www.sap.com) is also the name of a German software giant.
	www.fastload.org /sa/SAP.html (164 words)

	Voice Over IP : Protocols and Standards
		SDP is intended for describing multimedia sessions for the purpose of session announcement, session invitation etc. The purpose of SDP is to convey information about media streams in multimedia sessions to allow the recipients of a session description to participate in the session.
		A SAP announcement is multicast with the same scope as the session it is announcing, ensuring that the recipients of the announcement can also be potential recipients of the session being advertised.
		SAP is intended to announce the existence of a long-lived wide area multicast sessions and involves a large startup delay before a complete set of announcements is heard by a listener.
	www.geocities.com /dinbbil30/voip.htm (7390 words)

	The Session Announcement Model (Site not responding. Last check: 2007-10-04)
		In its simplest form, this involved periodically multicasting a session announcement packet describing a particular session.
		The interval between repeats of the same session description message depends on the number of sessions being announced (each sender at a particular scope can hear the other senders in the same scope) such that the bandwidth being used for session announcements of a particular scope is kept approximately constant.
		In any event, such a deleted session will be reinstated as soon as the network partition is resolved and another announcement packet is received.
	www.ece.purdue.edu /~ace/mbone/mbone/sdr/node1.html (423 words)

	SDP: Session Description Protocol Overview (RFC 2327)
		The Session Description Protocol (SDP) describes multimedia sessions for the purpose of session announcement, session invitation and other forms of multimedia session initiation.
		SDP is purely a format for session description - it does not incorporate a transport protocol, and is intended to use different transport protocols as appropriate including the Session Announcement Protocol (SAP), Session Initiation Protocol (SIP), Real-Time Streaming Protocol (RTSP), electronic mail using the MIME extensions, and the Hypertext Transport Protocol (HTTP).
		Many of the SDP messages are sent by periodically multicasting an announcement packet to a well-known multicast address and port using SAP (session announcement protocol).
	www.javvin.com /protocolSDP.html (308 words)

	RFC 2327 (rfc2327)
		It is not expected that fully-qualified domain names or unicast addresses Handley & Jacobson Standards Track [Page 12] RFC 2327 SDP April 1998 will be given in a session description that is communicated by a multicast announcement, though this is not prohibited.
		An sdplang attribute SHOULD be specified when a session is of Handley & Jacobson Standards Track [Page 25] RFC 2327 SDP April 1998 sufficient scope to cross geographic boundaries where the language of recipients cannot be assumed, or where the session is in a different language from the locally assumed norm.
		Handley & Jacobson Standards Track [Page 28] RFC 2327 SDP April 1998 Session descriptions may be parsed at intermediate systems such as firewalls for the purposes of opening a hole in the firewall to allow the participation in multimedia sessions.
	www.cse.ohio-state.edu /cgi-bin/rfc/rfc2327.html (9636 words)

	[No title]
		The "o=" field gives the originator of the session (their username and the address of the user's host) plus a session id and session version number.
		is the globally unique address of the machine from which the session was created.
		This can be a session level attribute or a media level attribute.
	www.ietf.org /rfc/rfc2327.txt (9636 words)

	SAP - Second Audio Program, Service Access Point, Service Advertising Protocol, Session Announcement Protocol, Symbolic ...
		SAP - Second Audio Program, Service Access Point, Service Advertising Protocol, Session Announcement Protocol, Symbolic Assembly Program, Systeme, Anwendungen, Produkte in der datenverarbeitung
		Searched for more definitions; no definitions of SAP found.
		Every attempt has been made to provide you with the correct acronym for SAP.
	www.auditmypc.com /acronym/SAP.asp (202 words)

	SDP: Session Description Protocol - Handley, Jacobson (ResearchIndex) (Site not responding. Last check: 2007-10-04)
		Abstract: The sd session directory tool has been in use for some time on the Mbone for announcing multicast sessions.
		This document describes an exhanced version of the sd protocol (SDP v2), and explains the extensions to the protocol that have become desirable.
		Comments are solicited and should be addressed to the working group's mailing list at confctrl@isi.edu and/or...
	citeseer.ist.psu.edu /handley95sdp.html (452 words)

	Zvon - RFC 2974 [Session Announcement Protocol] - Session Modification
		Zvon - RFC 2974 [Session Announcement Protocol] - Session Modification
		A pre-announced session can be modified by simply announcing the modified session description.
		XML/XSLT Forums - Do you have a tough XML or XSLT Question?
	www.zvon.org /tmRFC/RFC2974/Output/chapter5.html (316 words)

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