300-070 Question #184: Real Exam Question with Answer & Explanation

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

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.

Community Discussion

No community discussion yet for this question.

Full 300-070 Practice