An engineer must design a scalable QoS architecture that allows the separation of the traffic into classes on predefined business requirements. The design must also utilize the differentiated…

The correct answer is B. DiffSery. DiffServ (Differentiated Services) is the correct answer for multiple reasons. It uses the DSCP (Differentiated Services Code Point) field, which is 6 bits wide, providing 64 possible distinct code point values - far exceeding the requirement of 10 classification levels…

Network Services

Question

An engineer must design a scalable QoS architecture that allows the separation of the traffic into classes on predefined business requirements. The design must also utilize the differentiated services code points as the QoS priority descriptor value and support at least 10 levels of classification. Which QoS technology should the engineer include in the design?

Options

ARSVP
BDiffSery
CBest Effort
DInterServ

How the community answered

(58 responses)

A
7% (4)
B
88% (51)
C
3% (2)
D
2% (1)

Explanation

DiffServ (Differentiated Services) is the correct answer for multiple reasons. It uses the DSCP (Differentiated Services Code Point) field, which is 6 bits wide, providing 64 possible distinct code point values - far exceeding the requirement of 10 classification levels. DiffServ is also a scalable, per-hop-behavior model that does not require per-flow state in the network, making it suitable for large architectures. Option A (RSVP) is part of IntServ and uses per-flow resource reservation, not DSCP as its primary descriptor. Option C (Best Effort) provides no QoS classification whatsoever. Option D (IntServ) uses RSVP for per-flow signaling and does not scale well to large networks, nor does it use DSCP as its primary mechanism.

Topics

#QoS#DiffServ#DSCP#Network Design

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