- A
Ensure both units have the same App-ID license installed.
Correct. The App-ID license is required to receive App-ID signatures. If the passive unit lacks this license, it won't have the same signatures as the active unit, leading to incorrect App-ID after failover.
- B
Configure session distribution for symmetric return.
Why wrong: Incorrect. Session distribution for symmetric return deals with traffic pathing and session ownership in HA, not with App-ID signature synchronization.
- C
Verify that application override policies are replicated via HA configuration sync.
Why wrong: Incorrect. Application override policies are configuration objects that map applications to specific ports or data filters; they are not related to the synchronization of App-ID signatures, which are part of content updates.
- D
Check that sessions are established on both units.
Why wrong: Incorrect. Sessions being established on both units is a normal HA behavior and does not affect App-ID signature availability.
Why Are App-ID Signatures Not Syncing in a High-Availability Pair?
This PCNSE practice question tests your understanding of securing traffic and app-id. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
A firewall in a high-availability pair shows that App-ID signatures are not syncing between units. Sessions are failing over but application identification is incorrect on the passive unit. What should the administrator verify?
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
Ensure both units have the same App-ID license installed.
Option A is correct because App-ID signatures are part of the content (App-ID and threat) updates, which require the App-ID license. If both units do not have the same App-ID license installed, the passive unit may lack the necessary signatures, causing incorrect application identification after failover. Verifying that both units have the same license ensures they are eligible to receive the same content updates.
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.
- ✓
Ensure both units have the same App-ID license installed.
Why this is correct
Correct. The App-ID license is required to receive App-ID signatures. If the passive unit lacks this license, it won't have the same signatures as the active unit, leading to incorrect App-ID after failover.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Configure session distribution for symmetric return.
Why it's wrong here
Incorrect. Session distribution for symmetric return deals with traffic pathing and session ownership in HA, not with App-ID signature synchronization.
- ✗
Verify that application override policies are replicated via HA configuration sync.
Why it's wrong here
Incorrect. Application override policies are configuration objects that map applications to specific ports or data filters; they are not related to the synchronization of App-ID signatures, which are part of content updates.
- ✗
Check that sessions are established on both units.
Why it's wrong here
Incorrect. Sessions being established on both units is a normal HA behavior and does not affect App-ID signature availability.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Candidates often confuse application override policies (configuration) with App-ID signature updates (content). The question specifically states 'App-ID signatures are not syncing,' which points to content synchronization and licensing, not configuration replication.
Detailed technical explanation
How to think about this question
In a PAN-OS HA pair, configuration synchronization (config sync) replicates most settings, but application override policies are part of the 'Application and Threat' configuration subset that may not sync automatically unless explicitly enabled under 'High Availability > Setup > Configuration Synchronization'. App-ID signatures themselves are updated via dynamic content updates, which must be applied to both units independently or via a shared content update schedule. A real-world scenario is when an administrator creates custom application overrides for internal apps on the active unit but forgets to enable sync for those policies, causing the passive unit to misclassify traffic after failover.
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.
Visual reference
What to study next
Got this wrong? Here's your next step.
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Securing Traffic and App-ID — study guide chapter
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FAQ
Questions learners often ask
What does this PCNSE question test?
Securing Traffic and App-ID — This question tests Securing Traffic and App-ID — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Ensure both units have the same App-ID license installed. — Option A is correct because App-ID signatures are part of the content (App-ID and threat) updates, which require the App-ID license. If both units do not have the same App-ID license installed, the passive unit may lack the necessary signatures, causing incorrect application identification after failover. Verifying that both units have the same license ensures they are eligible to receive the same content updates.
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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Last reviewed: Jul 4, 2026
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.
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