Quick Answer
The answer is Critical. On Cisco IOS-XE devices, the default CoPP classification for ARP packets is critical because ARP is fundamental to Layer 2 connectivity, and misclassification could allow ARP spoofing or flooding to disrupt network operations. Control Plane Policing (CoPP) uses this classification to ensure that ARP packets receive priority treatment, protecting the control plane from excessive or malicious traffic while still allowing legitimate ARP resolution. On the CCNP ENARSI 300-410 exam, this topic tests your understanding of CoPP class maps and default policy assignments—a common trap is assuming ARP is classified as normal or medium, since it is a Layer 2 protocol, but Cisco explicitly assigns it to the critical class due to its role in adjacency maintenance. A useful memory tip: think of ARP as the network’s address book—if you lose it, you cannot reach anyone, so it must be treated as critical.
This 300-410 practice question tests your understanding of control plane policing (copp). Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
What is the default CoPP classification for ARP packets on a Cisco IOS-XE device?
Normal
Why wrong: ARP is considered critical because it is required for basic connectivity.
Critical
ARP is classified as critical to ensure that address resolution is not starved by CoPP.
Management
Why wrong: Management traffic includes protocols like SSH and SNMP, not ARP.
Best-effort
Why wrong: Best-effort is for non-critical traffic; ARP is critical for network operation.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Critical
ARP packets are essential for Layer 2 connectivity and are typically classified as 'critical' in CoPP to prevent ARP spoofing or flooding from disrupting network operations.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Normal
Why it's wrong here
ARP is considered critical because it is required for basic connectivity.
Critical
Why this is correct
ARP is classified as critical to ensure that address resolution is not starved by CoPP.
Related concept
Read the scenario before looking for a memorised answer.
Management
Best-effort
Why it's wrong here
Best-effort is for non-critical traffic; ARP is critical for network operation.
Common exam traps
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the 300-410 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Identify which 300-410 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Control Plane Policing (CoPP) — study guide chapter
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FAQ
Control Plane Policing (CoPP) — This question tests Control Plane Policing (CoPP) — Read the scenario before looking for a memorised answer..
The correct answer is: Critical — ARP packets are essential for Layer 2 connectivity and are typically classified as 'critical' in CoPP to prevent ARP spoofing or flooding from disrupting network operations.
Identify which 300-410 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jun 18, 2026
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.
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