The answer is disabling unused security profiles, enabling hardware acceleration, and reducing logging volume. These three actions directly improve firewall performance by reducing CPU load because they eliminate unnecessary processing overhead, offload compute-intensive tasks to dedicated hardware, and minimize the I/O burden from excessive log writes. On the Palo Alto Networks Certified Network Security Administrator PCNSA exam, this question tests your understanding of resource management versus feature functionality—a common trap is assuming SSL decryption or reactive policies help performance, when in fact both increase CPU cycles. Remember the mnemonic “DHL” for Disable, Hardware, Logging to recall the three correct options that lighten the CPU’s workload.
PCNSA Core Concepts Practice Question
This PCNSA practice question tests your understanding of core concepts. 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 actions can improve firewall performance by reducing CPU load? (Choose three.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable hardware acceleration for packet processing
Options B, D, E are correct. Disabling unused features frees up resources. Enabling hardware acceleration offloads processing. Reducing logging volume lowers I/O. Option A is wrong because enabling SSL decryption increases CPU load. Option C is wrong because using reactive policies (e.g., dynamic updates) adds overhead.
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.
✓
Enable hardware acceleration for packet processing
Why this is correct
Hardware acceleration offloads processing to specialized chips, reducing CPU load.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use reactive policy updates via API
Why it's wrong here
Reactive updates can cause CPU spikes and are not recommended for performance.
✓
Reduce log verbosity for allowed traffic
Why this is correct
Logging requires CPU and disk I/O; reducing log volume lowers load.
Related concept
Read the scenario before looking for a memorised answer.
✓
Disable unused security profiles
Why this is correct
Unused profiles still consume resources during policy lookup; disabling them reduces overhead.
Related concept
Read the scenario before looking for a memorised answer.
✗
Enable SSL decryption for all traffic
Why it's wrong here
SSL decryption is computationally intensive and increases CPU load.
Common exam traps
Common exam trap: answer the scenario, not the keyword
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
How to think about this question
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.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 PCNSA 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 PCNSA 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.
Core Concepts — This question tests Core Concepts — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable hardware acceleration for packet processing — Options B, D, E are correct. Disabling unused features frees up resources. Enabling hardware acceleration offloads processing. Reducing logging volume lowers I/O. Option A is wrong because enabling SSL decryption increases CPU load. Option C is wrong because using reactive policies (e.g., dynamic updates) adds overhead.
What should I do if I get this PCNSA question wrong?
Identify which PCNSA 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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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This PCNSA 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 PCNSA exam.
Question Discussion
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