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RSVP - Resource Reservation Protocol
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enables Internet applications to obtain special QoS
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it is not a routing protocol, but it works in conjunction with routing protocols
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RSVP is a Transport Protocol in OSI RM ( 4th layer)
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RSVP supports 3 types of traffic
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best-effort: traditional IP traffic (best effort service)
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rate-sensitive: e.g. H323 video-conferencing require constant transport rate (guaranteed bit-rate service)
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delay sensitive: e.g. MPEG-II (predictive service or controlled-delay service)
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