350-401 Question 257
Single answerAn organization has been experiencing intermittent network outages due to high CPU utilization on their edge router caused by malicious traffic targeting the control plane. The network administrator decides to implement Control Plane Policing (CoPP) to protect the router. What is the primary objective of CoPP in this scenario?
- A
To prevent all traffic from reaching the control plane
- B
To limit and prioritize traffic destined for the control plane
- C
To redirect traffic from the control plane to a secondary device for processing
- D
To inspect and block all traffic originating from untrusted sources
Show answer and explanation
Correct answer: B
Explanation
Control Plane Policing (CoPP) is a QoS-based feature used to protect a router's control plane from excessive or malicious traffic. It allows administrators to define policies that limit and prioritize traffic destined for the control plane, ensuring critical protocol operations and management traffic are not disrupted during high traffic scenarios or attacks. This helps maintain the stability and performance of the router.
- A. Incorrect.
Incorrect: CoPP does not prevent all traffic from reaching the control plane. Instead, it allows critical traffic while filtering or rate-limiting unnecessary or malicious traffic.
- B. Correct.
Correct: CoPP is designed to limit and prioritize traffic destined for the control plane to ensure the router remains operational even during high traffic or attack scenarios.
- C. Incorrect.
Incorrect: CoPP does not redirect traffic to a secondary device. It enforces policies directly on the control plane.
- D. Incorrect.
Incorrect: While CoPP can block or limit certain traffic, its primary goal is not to block all traffic from untrusted sources, but to manage traffic efficiently and protect the router's resources.