PCNSE Deploy and Configure Firewalls Practice Question
This PCNSE practice question tests your understanding of deploy and configure firewalls. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
In an Active/Passive HA pair, which statement is true regarding configuration synchronization?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Only committed changes on the active are synced to the passive.
In an Active/Passive HA pair, configuration synchronization occurs only after changes are committed on the active firewall. The passive peer then receives the committed configuration via the HA control link (using TCP port 2928 by default). This ensures that only validated, committed changes are propagated, preventing the passive from receiving uncommitted or partial configurations that could cause instability.
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.
✗
Configuration is not synced automatically; the administrator must export and import.
Why it's wrong here
Synchronization occurs automatically after commit.
✓
Only committed changes on the active are synced to the passive.
Why this is correct
Configuration is synced after a commit operation.
Related concept
Read the scenario before looking for a memorised answer.
✗
All configuration changes on the active peer are automatically synced to the passive.
Why it's wrong here
Only committed changes are synced, not uncommitted changes.
✗
The passive peer initiates the sync.
Why it's wrong here
The active peer pushes the configuration to the passive.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume all configuration changes (including uncommitted candidate changes) are synced in real time, but Palo Alto Networks only syncs committed configurations to maintain consistency and prevent partial or broken configurations from being applied to the passive peer.
Detailed technical explanation
How to think about this question
Under the hood, the HA configuration sync uses the HA2 link (control link) to transfer the committed configuration as a binary blob. The active firewall serializes the entire candidate config after a commit and sends it to the passive, which then loads it into its own candidate config and commits it automatically. A subtle behavior is that if the HA link is down or the passive is unreachable, the active will queue the sync and retry, but the passive will remain out of sync until the link is restored and the sync completes.
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.
Deploy and Configure Firewalls — This question tests Deploy and Configure Firewalls — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Only committed changes on the active are synced to the passive. — In an Active/Passive HA pair, configuration synchronization occurs only after changes are committed on the active firewall. The passive peer then receives the committed configuration via the HA control link (using TCP port 2928 by default). This ensures that only validated, committed changes are propagated, preventing the passive from receiving uncommitted or partial configurations that could cause instability.
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.
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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
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