What is the first element of a QoS policy?

The correct answer is B. classification. Classification is always the first step in any QoS policy. Before traffic can be marked, queued, policed, shaped, or scheduled, the network device must first identify and classify each traffic flow (e.g., by DSCP value, ACL, protocol, or application). Without classification…

Advanced Enterprise Campus Networks

Question

Options

Apolicing
Bclassification
Cshaping
Dscheduling

How the community answered

(54 responses)

A
7% (4)
B
87% (47)
C
4% (2)
D
2% (1)

Explanation

Classification is always the first step in any QoS policy. Before traffic can be marked, queued, policed, shaped, or scheduled, the network device must first identify and classify each traffic flow (e.g., by DSCP value, ACL, protocol, or application). Without classification, the device has no basis on which to apply differential treatment. Policing (A) and shaping (C) are rate-limiting mechanisms that come after classification and marking. Scheduling (D) determines how queued packets are transmitted, which also occurs downstream of classification. The order is: Classify → Mark → Queue/Schedule/Police/Shape.

Topics

#QoS#classification#traffic marking#policy

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