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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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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