300-320 · Question #473
A Consultant has been tasked with QoS design. The customer has specified that for the application end-to-end bandwidth has to be specified. With what can you accomplish this?
The correct answer is A. IntServ with RSVP. IntServ (Integrated Services) with RSVP (Resource Reservation Protocol) is the only QoS model that provides guaranteed, end-to-end bandwidth reservation for specific flows. RSVP signals every router along the path to reserve the required bandwidth before traffic is sent…
Question
A Consultant has been tasked with QoS design. The customer has specified that for the application end-to-end bandwidth has to be specified. With what can you accomplish this?
Options
- AIntServ with RSVP
- BDiffServ
- CCoS markings
- DDSCP markings
How the community answered
(32 responses)- A94% (30)
- B3% (1)
- C3% (1)
Explanation
IntServ (Integrated Services) with RSVP (Resource Reservation Protocol) is the only QoS model that provides guaranteed, end-to-end bandwidth reservation for specific flows. RSVP signals every router along the path to reserve the required bandwidth before traffic is sent, ensuring the requested resources are available end-to-end. DiffServ provides relative prioritization and per-hop behavior but cannot guarantee specific bandwidth end-to-end across a network. CoS and DSCP are packet-marking mechanisms only - they classify and mark traffic but do not reserve or guarantee bandwidth by themselves.
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