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CCNP Practice Question: Which three statements about Control Plane…
Which three statements about Control Plane Policing (CoPP) are true? (Choose three.)
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
✓
CoPP uses Modular QoS CLI (MQC) to define traffic classes and policies.
CoPP protects the control plane by applying QoS policies to traffic destined to the route processor. Option A is correct because CoPP uses MQC (Modular QoS CLI) to define class maps and policy maps. Option C is correct because CoPP can rate-limit or drop traffic to prevent CPU overload. Option D is correct because CoPP classifies traffic into categories such as critical, normal, and management. Option B is incorrect because CoPP does not apply to the data plane; it applies to the control plane. Option E is incorrect because CoPP is applied to the control plane, not to interfaces directly; interface-level policing is done by other mechanisms.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
CoPP uses Modular QoS CLI (MQC) to define traffic classes and policies.
Why this is correct
Correct because CoPP is configured using MQC with class maps, policy maps, and the 'service-policy' command applied to the control plane.
- ✗
CoPP is used to police traffic in the data plane to protect against DoS attacks.
Why it's wrong here
Incorrect because CoPP protects the control plane, not the data plane. Data plane policing is done by other features like ACLs or QoS on interfaces.
- ✓
CoPP can rate-limit or drop certain types of control plane traffic to prevent CPU overload.
Why this is correct
Correct because CoPP can apply policing actions (e.g., drop, transmit, or set a rate limit) to control plane traffic to mitigate attacks.
- ✓
CoPP classifies traffic into categories such as critical, normal, and management.
Why this is correct
Correct because CoPP typically defines classes for different types of control plane traffic (e.g., routing protocols, SSH, ICMP) with appropriate policies.
- ✗
CoPP is applied directly to physical interfaces using the 'service-policy' command.
Why it's wrong here
Incorrect because CoPP is applied to the control plane using 'service-policy input' under 'control-plane' configuration, not directly to interfaces.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-401 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 350-401 exam.