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Automation and Quality of ServiceseasyMultiple ChoiceObjective-mapped

350-501 Automation and Quality of Services Practice Question

Which MQC component is used to match traffic based on criteria such as DSCP or IP precedence?

⚠ Common exam trap

Cisco often tests the distinction between class-map (classification) and policy-map (action), so candidates mistakenly select policy-map because they associate it with QoS policies, forgetting that classification is done separately in the class-map.

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

Class-map

In the Modular QoS CLI (MQC), the class-map component is used to define traffic classes by matching packets based on criteria such as DSCP (Differentiated Services Code Point) or IP precedence values. The class-map uses match statements (e.g., match ip dscp, match ip precedence) to classify traffic, which is then applied within a policy-map for QoS actions. This makes class-map the correct MQC component for traffic matching.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

  • Class-map

    Why this is correct

    Class-map uses match statements to identify traffic.

  • Service-policy

    Why it's wrong here

    Service-policy applies the policy to an interface.

  • Policy-map

    Why it's wrong here

    Policy-map defines actions, not classification.

  • Access-list

    Why it's wrong here

    Access-list can be used within class-map, but class-map is the MQC component.

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Written by Johnson Ajibi, MSc IT Security

Senior Network & Security Engineer · founder of Courseiva

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