350-501 Security and Services Practice Question
A service provider wants to protect its routers from CPU overload caused by excessive traffic to the control plane. Which mechanism should be configured on IOS XR routers to classify and rate-limit management traffic?
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 (Control Plane Protection)
CoPP (Control Plane Protection) on IOS XR uses class maps and policy maps to classify and rate-limit traffic destined to the control plane, protecting the router from CPU overload.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
uRPF strict mode
Why it's wrong here
uRPF is used for anti-spoofing, not for control plane protection.
- ✗
BGP Flowspec
Why it's wrong here
BGP Flowspec distributes traffic filtering rules, but does not directly rate-limit control plane traffic.
- ✗
MPLS TTL propagation
Why it's wrong here
MPLS TTL propagation is related to label spoofing prevention, not control plane protection.
- ✓
CoPP (Control Plane Protection)
Why this is correct
CoPP is designed to protect the control plane by rate-limiting traffic.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-501 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 350-501 exam.