300-070 · Question #184
Which QoS model is bandwidth-dedicated to provide sufficient quality for applications that need high resolution, such as video terminals?
The correct answer is A. DiffServ. DiffServ (Differentiated Services) is the QoS model used to provide sufficient, prioritized bandwidth for high-demand applications like high-resolution video terminals. DiffServ classifies and marks traffic at the network edge using DSCP values and applies per-hop behaviors (PHBs
Question
Which QoS model is bandwidth-dedicated to provide sufficient quality for applications that need high resolution, such as video terminals?
Options
- ADiffServ
- BBest-Effort
- CDiffServf
- DIntServ
How the community answered
(37 responses)- A92% (34)
- B5% (2)
- C3% (1)
Explanation
DiffServ (Differentiated Services) is the QoS model used to provide sufficient, prioritized bandwidth for high-demand applications like high-resolution video terminals. DiffServ classifies and marks traffic at the network edge using DSCP values and applies per-hop behaviors (PHBs) such as Expedited Forwarding (EF) to deliver low-latency, bandwidth-assured service to priority traffic classes. While IntServ (Integrated Services) uses RSVP to hard-reserve bandwidth end-to-end, DiffServ is the scalable, widely deployed model used in enterprise and service provider networks to effectively dedicate bandwidth to video and voice applications. Best-Effort (Option B) provides no guarantees at all. Option C ('DiffServf') appears to be a typo and is not a valid QoS model.
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