- A
Dropped
Why wrong: Unmatched traffic is not dropped by default; it is transmitted.
- B
Transmitted
The default action for traffic not matching any class is to transmit it, unless a 'class class-default' is configured with a police action.
- C
Logged and dropped
Why wrong: Logging is not automatic; dropping requires explicit configuration.
- D
Routed to the management plane
Why wrong: There is no separate management plane for CoPP; all traffic is processed by the control plane.
Question 1,383 of 2,152
CoPP Default Class Behavior
This 300-410 practice question tests your understanding of control plane policing (copp). This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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?
Quick Answer
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.
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
✓
Transmitted
By default, Control Plane Policing (CoPP) uses a class-default in the policy-map that implicitly permits (transmits) all traffic not explicitly matched by a user-defined class. This default behavior ensures that only traffic matching a class with a 'drop' action is policed, preventing unintentional denial of service from misconfigured policies.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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
Read the scenario before looking for a memorised answer.
- ✗
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: answer the scenario, not the keyword
Cisco often tests the misconception that CoPP drops all unmatched traffic by default, similar to how ACLs have an implicit deny at the end, but CoPP's class-default actually permits traffic unless explicitly configured to drop.
Detailed technical explanation
How to think about this question
Under the hood, CoPP applies a QoS policy to the control plane's input or output path. The policy-map includes an implicit 'class class-default' with a 'police' action that defaults to 'transmit' (no rate limit). This means all traffic not matching a user-defined class is allowed through without policing, which is critical for protocols like OSPF or BGP that must reach the CPU. In real-world scenarios, forgetting to explicitly drop unwanted traffic (e.g., SSH brute-force attempts) can leave the control plane vulnerable, but the default transmit behavior prevents accidental blocking of legitimate traffic.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
- →
Control Plane Policing (CoPP) — study guide chapter
Learn the concepts, then practise the questions
- →
Control Plane Policing (CoPP) practice questions
Targeted practice on this topic area only
- →
All 300-410 questions
2,152 questions across all exam domains
- →
Cisco CCNP ENARSI 300-410 study guide
Full concept coverage aligned to exam objectives
- →
300-410 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related 300-410 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Layer 3 Technologies practice questions
Practise 300-410 questions linked to Layer 3 Technologies.
EIGRP Troubleshooting practice questions
Practise 300-410 questions linked to EIGRP Troubleshooting.
OSPF Troubleshooting (v2/v3) practice questions
Practise 300-410 questions linked to OSPF Troubleshooting (v2/v3).
BGP Troubleshooting practice questions
Practise 300-410 questions linked to BGP Troubleshooting.
Route Redistribution practice questions
Practise 300-410 questions linked to Route Redistribution.
Policy-Based Routing (PBR) practice questions
Practise 300-410 questions linked to Policy-Based Routing (PBR).
VRF-Lite practice questions
Practise 300-410 questions linked to VRF-Lite.
Route Maps and Route Filtering practice questions
Practise 300-410 questions linked to Route Maps and Route Filtering.
Administrative Distance practice questions
Practise 300-410 questions linked to Administrative Distance.
Route Summarization practice questions
Practise 300-410 questions linked to Route Summarization.
Bidirectional Forwarding Detection (BFD) practice questions
Practise 300-410 questions linked to Bidirectional Forwarding Detection (BFD).
VPN Technologies practice questions
Practise 300-410 questions linked to VPN Technologies.
Practice this exam
Start a free 300-410 practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Questions learners often ask
What does this 300-410 question test?
Control Plane Policing (CoPP) — This question tests Control Plane Policing (CoPP) — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Transmitted — By default, Control Plane Policing (CoPP) uses a class-default in the policy-map that implicitly permits (transmits) all traffic not explicitly matched by a user-defined class. This default behavior ensures that only traffic matching a class with a 'drop' action is policed, preventing unintentional denial of service from misconfigured policies.
What should I do if I get this 300-410 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Keep practising
More 300-410 practice questions
- Drag and drop the steps to negotiate an IKEv2 IPsec site-to-site tunnel into the correct order, from first to last.
- Drag and drop the steps to troubleshoot an IPsec site-to-site VPN adjacency failure into the correct order, from first t…
- Drag and drop the steps to verify and validate the operational state of an IPsec site-to-site VPN into the correct order…
- Consider the following configuration snippet: ip cef ! interface GigabitEthernet0/0 ip address 10.0.0.1 255.255.255.25…
- A router is configured with 'logging host 10.1.1.100' and 'logging trap informational'. The engineer notices that syslog…
- Drag and drop the steps to configure a GRE tunnel for IPv6 over IPv4 into the correct order, from first to last.
Last reviewed: Jul 4, 2026
This 300-410 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 300-410 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.