The answer is transmitted. This is the default CoPP behavior because Control Plane Policing uses a policy-map that, like any MQC policy, applies an implicit permit-and-send action to traffic that does not match any configured class. If you define a policy-map without an explicit class class-default statement, the control plane will forward all unmatched packets without any policing or drop action, effectively treating them as permitted. On the Cisco CCNP ENARSI 300-410 exam, this concept tests your understanding of MQC default behavior and how it applies specifically to CoPP; a common trap is assuming unmatched traffic is dropped or that you must explicitly define a class-default to allow traffic. Remember that CoPP is a filter, not a firewall—if you do not block it, it flows. A useful memory tip: no class-default means no cop, so traffic gets a free pass.
300-410 Control Plane Policing (CoPP) Practice Question
This 300-410 practice question tests your understanding of control plane policing (copp). Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
What is the default CoPP behavior for traffic that does not match any class in the policy-map?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Transmitted
If a policy-map has no explicit 'class class-default' statement, unmatched traffic is implicitly permitted and transmitted without policing.
Key principle: ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Dropped
Why it's wrong here
Unmatched traffic is not dropped by default; it is transmitted.
✓
Transmitted
Why this is correct
The default action for traffic not matching any class is to transmit it, unless a 'class class-default' is configured with a police action.
Related concept
Standard ACLs match source addresses.
✗
Logged and dropped
Why it's wrong here
Logging is not automatic; dropping requires explicit configuration.
✗
Routed to the management plane
Why it's wrong here
There is no separate management plane for CoPP; all traffic is processed by the control plane.
Common exam traps
Common exam trap: ACLs stop at the first match
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Detailed technical explanation
How to think about this question
ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.
KKey Concepts to Remember
Standard ACLs match source addresses.
Extended ACLs can match source, destination, protocol and ports.
The first matching ACL entry is used.
There is usually an implicit deny at the end.
TExam Day Tips
→Check inbound versus outbound direction.
→Read the ACL from top to bottom.
→Look for a broader permit or deny above the intended line.
Key takeaway
ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Real-world example
How this comes up in practice
A security administrator must allow nursing staff to reach a patient records server while blocking access from the guest Wi-Fi VLAN. After applying an extended ACL, traffic is still blocked from nursing workstations. The ACL was applied outbound instead of inbound on the wrong interface. Questions like this test ACL direction and placement rules.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 300-410 question in full detail.
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related 300-410 ACL questions on filtering logic and placement.
Control Plane Policing (CoPP) — This question tests Control Plane Policing (CoPP) — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: Transmitted — If a policy-map has no explicit 'class class-default' statement, unmatched traffic is implicitly permitted and transmitted without policing.
What should I do if I get this 300-410 question wrong?
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related 300-410 ACL questions on filtering logic and placement.
What is the key concept behind this question?
Standard ACLs match source addresses.
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