RSVP is a network control protocol that will allow Internet applications to obtain special qualities-of-service for their data flows.
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This will generally require reserving resources along the data path(s).
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RSVP is a component of the future "integrated services" Internet, which will provide both best-effort and real-time qualities of service
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When an application in a host requests a specific QoS for its data stream, RSVP is used to deliver the request to each router along the path(s) of the data stream and to maintain router and host state to provide the requested service.
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Although RSVP was developed for setting up resource reservations, it is easily adaptable to transport other kinds of network control information along data flow paths.
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