PCNSE Manage, Monitor and Operate Practice Question
This PCNSE practice question tests your understanding of manage, monitor and operate. 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.
Which THREE are common causes of high CPU utilization on a Palo Alto Networks firewall? (Choose three.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Large number of dynamic IP address group lookups.
A large number of dynamic IP address group lookups can cause high CPU utilization because each lookup requires the firewall to evaluate the dynamic group membership in real time, often involving LDAP or other directory queries. This process is computationally expensive, especially when policies trigger frequent lookups for every new session, leading to sustained CPU spikes.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Large number of dynamic IP address group lookups.
Why this is correct
Dynamic group lookups can be CPU intensive.
Related concept
Read the scenario before looking for a memorised answer.
Poorly ordered rules with many matches can cause high CPU.
Related concept
Read the scenario before looking for a memorised answer.
✗
Insufficient disk space on the log partition.
Why it's wrong here
Disk space affects storage, not CPU directly.
✓
Excessive logging due to very frequent session matches.
Why this is correct
High logging rate can consume CPU.
Related concept
Read the scenario before looking for a memorised answer.
✗
BGP prefix flapping causing route recalculations.
Why it's wrong here
BGP flapping can cause CPU, but it's less common than the others; may be considered plausible but not a top three.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse disk space issues (Option C) with CPU utilization, but disk space problems affect storage and logging, not CPU directly, while BGP flapping (Option E) is a control-plane issue that is less commonly cited as a top cause of high CPU in Palo Alto Networks documentation.
Detailed technical explanation
How to think about this question
Dynamic IP address group lookups rely on the firewall querying external sources (e.g., Active Directory, LDAP) or internal mappings each time a policy match occurs, which can be CPU-intensive if the group contains many entries or if the lookup is performed per session. Inefficient security policy rules, such as overly broad rules with many objects or rules placed out of order, force the firewall to evaluate more rules per session, increasing session setup CPU load. Excessive logging, especially when set to 'log at session end' for every session, generates a high volume of log writes that can consume CPU cycles on the management plane, particularly under high session rates.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the PCNSE 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
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Manage, Monitor and Operate — This question tests Manage, Monitor and Operate — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Large number of dynamic IP address group lookups. — A large number of dynamic IP address group lookups can cause high CPU utilization because each lookup requires the firewall to evaluate the dynamic group membership in real time, often involving LDAP or other directory queries. This process is computationally expensive, especially when policies trigger frequent lookups for every new session, leading to sustained CPU spikes.
What should I do if I get this PCNSE question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This PCNSE practice question is part of Courseiva's free Palo Alto Networks 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 PCNSE exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.