300-070 · Question #310
Which QoS model uses RSVP to explicitly signal the bandwidth needs of real-time applications such as remote video and multimedia conferencing?
The correct answer is D. IntServ. IntServ (Integrated Services) is the QoS model that uses RSVP (Resource Reservation Protocol) to explicitly reserve end-to-end bandwidth for individual flows. Applications signal their bandwidth requirements using RSVP PATH and RESV messages, and network devices along the path…
Question
Which QoS model uses RSVP to explicitly signal the bandwidth needs of real-time applications such as remote video and multimedia conferencing?
Options
- ADiffServ
- BBest-Effort
- CDiffServf
- DIntServ
How the community answered
(43 responses)- A2% (1)
- B2% (1)
- C9% (4)
- D86% (37)
Explanation
IntServ (Integrated Services) is the QoS model that uses RSVP (Resource Reservation Protocol) to explicitly reserve end-to-end bandwidth for individual flows. Applications signal their bandwidth requirements using RSVP PATH and RESV messages, and network devices along the path reserve resources accordingly. This provides hard QoS guarantees but does not scale well in large networks. DiffServ (Differentiated Services) uses DSCP markings to classify and prioritize traffic without per-flow signaling. Best-Effort provides no QoS guarantees at all. 'DiffServf' is not a real QoS model and appears as a distractor.
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