Cisco
300-320 · Question #63
300-320 Question #63: Real Exam Question with Answer & Explanation
The correct answer is B: protect the network device route processor from getting overloaded by rate limiting the incoming. Control Plane Policing (CoPP) rate-limits traffic directed at the router's control plane to protect the route processor from being overwhelmed by excessive or malicious traffic.
Question
What is one reason to implement Control Plane Policing?
Options
- Aallow OSPF routing protocol to advertise routes
- Bprotect the network device route processor from getting overloaded by rate limiting the incoming
- Callow network devices to generate and receive packets
- Dprotect the data plane packets
Explanation
Control Plane Policing (CoPP) rate-limits traffic directed at the router's control plane to protect the route processor from being overwhelmed by excessive or malicious traffic.
Common mistakes.
- A. CoPP does not enable OSPF to advertise routes - OSPF functions independently; CoPP simply limits how many OSPF packets per second reach the CPU.
- C. Network devices generate and receive packets regardless of CoPP - that is a fundamental function not governed by policing policy.
- D. CoPP explicitly protects the control plane (CPU/route processor), not the data plane, which is handled by forwarding ASICs.
Concept tested. Control Plane Policing (CoPP) for CPU protection
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