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300-410 Practice Question: Is NOT a valid match criterion for a class-map…
Which of the following is NOT a valid match criterion for a class-map used in Control Plane Policing?
⚠ Common exam trap
Cisco often tests the distinction between match criteria available in CoPP class-maps versus those in general QoS class-maps, and the trap here is that candidates assume match protocol is universally valid across all class-map types, when it is specifically excluded from CoPP.
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
✓
match protocol
In Control Plane Policing (CoPP), class-maps are used to classify traffic destined to the control plane. The valid match criteria include match access-group, match ip dscp, and match ip precedence. However, match protocol is not a valid match criterion for a class-map under CoPP; it is used in other contexts like QoS policy-maps for application-level classification, but not for CoPP class-maps.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
match access-group
Why it's wrong here
Incorrect. This is a valid match criterion.
- ✗
match ip dscp
Why it's wrong here
Incorrect. This is a valid match criterion.
- ✓
match protocol
Why this is correct
Correct. match protocol is not supported in CoPP; only ACLs, DSCP, or IP precedence are allowed.
- ✗
match ip precedence
Why it's wrong here
Incorrect. This is a valid match criterion.
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Senior Network & Security Engineer · founder of Courseiva
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