hardMultiple ChoiceObjective-mapped
300-410 Practice Question: Which CoPP feature allows the control plane to…
Which CoPP feature allows the control plane to process packets from a specific source IP address without rate limiting?
⚠ Common exam trap
Cisco often tests the distinction between CoPP (which applies rate limits to all matched traffic) and CPPr (which can create exceptions), leading candidates to mistakenly think aggregate policers or QoS actions can achieve the same per-source exemption.
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
✓
Control Plane Protection (CPPr) exception
Control Plane Protection (CPPr) extends CoPP by allowing granular control over which packets are subject to rate limiting. The CPPr exception feature specifically permits packets from a trusted source IP address to bypass all rate-limiting policies, ensuring critical traffic like routing protocol updates or management access is never dropped even under attack conditions.
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 aggregate policer
Why it's wrong here
The aggregate policer applies to all traffic in the class, not per-source exceptions.
- ✓
Control Plane Protection (CPPr) exception
Why this is correct
CPPr allows defining exceptions to bypass CoPP for trusted sources, such as management stations or routing peers.
- ✗
QoS pre-classify
Why it's wrong here
QoS pre-classify is used for VPN traffic classification, not for CoPP exceptions.
- ✗
Policy-map 'set' action
Why it's wrong here
The 'set' action modifies packet markings, but does not create exceptions to policing.
Quick reference
Routing Protocol Comparison
| Protocol | Metric | Max Hops | Algorithm | Type |
|---|---|---|---|---|
| RIP v2 | Hop count | 15 | Bellman-Ford | Distance vector |
| OSPF | Cost (bandwidth) | Unlimited | Dijkstra (SPF) | Link state |
| EIGRP | Composite metric | Unlimited | DUAL | Hybrid |
| IS-IS | Cost | Unlimited | Dijkstra | Link state |
| BGP | Policy / attributes | Unlimited | Path vector | Path vector |
RIP's 15-hop limit makes it unsuitable for large networks. OSPF and EIGRP dominate modern enterprise deployments.
Go deeper
Related to this question
About these practice questions
Courseiva writes every 300-410 question from scratch — 1,966 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.