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.
An organization has a firewall in HA active-passive mode. After a failover, the new active firewall does not have the latest session table. What should be configured to ensure session synchronization?
Packet capture on active
Why wrong: Packet capture is for monitoring traffic, not for session replication.
Session setup on both peers
Why wrong: There is no 'session setup' configuration; session sync is the correct feature.
HA session sync
This feature synchronizes active sessions to the passive firewall.
Commit force sync
Why wrong: This is not a valid command; configuration sync is separate.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
HA session sync
Option C is correct because HA session synchronization (session sync) is the feature that replicates active session state from the active firewall to the passive firewall in an active-passive HA pair. Without this configuration, after a failover the new active firewall has no knowledge of existing sessions, causing all active connections to be dropped and requiring clients to re-establish them. Enabling session sync ensures the passive firewall maintains a synchronized session table, allowing seamless traffic continuation after failover.
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.
Packet capture on active
Why it's wrong here
Packet capture is for monitoring traffic, not for session replication.
Session setup on both peers
Why it's wrong here
There is no 'session setup' configuration; session sync is the correct feature.
HA session sync
Why this is correct
This feature synchronizes active sessions to the passive firewall.
Related concept
Read the scenario before looking for a memorised answer.
Commit force sync
Why it's wrong here
This is not a valid command; configuration sync is separate.
Common exam traps
The trap here is that candidates often confuse configuration synchronization (commit force sync) with runtime state synchronization (session sync), leading them to select Option D, but commit force sync only pushes configuration changes, not dynamic session data.
Trap categories for this question
Command / output trap
This is not a valid command; configuration sync is separate.
Detailed technical explanation
Session synchronization in PAN-OS uses a proprietary protocol over the HA control link (typically a dedicated interface) to replicate session state, including Layer 4-7 metadata, application identification, and security policy enforcement results. The session sync interval and the maximum number of sessions that can be synchronized are configurable, and in high-throughput environments, careful tuning is required to avoid control link saturation. A real-world scenario where this matters is in VoIP or database connections, where session drops cause call teardowns or transaction failures, making session sync critical for maintaining business continuity.
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 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
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Deploy and Configure Firewalls — study guide chapter
Learn the concepts, then practise the questions
Deploy and Configure Firewalls practice questions
Targeted practice on this topic area only
All PCNSE questions
516 questions across all exam domains
Palo Alto Networks Certified Network Security Engineer PCNSE study guide
Full concept coverage aligned to exam objectives
PCNSE practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Practise PCNSE questions linked to Manage, Monitor and Operate.
Practise PCNSE questions linked to Securing Traffic and App-ID.
Practise PCNSE questions linked to Securing Users and Applications with Authentication.
Practise PCNSE questions linked to Decryption and SSL Inspection.
Practise PCNSE questions linked to Managing Troubleshooting and High Availability.
Practise PCNSE questions linked to Deploy and Configure Firewalls.
Practise PCNSE questions linked to Core Concepts and Architecture.
Practise PCNSE questions linked to Secure Access and VPN.
Practise PCNSE questions linked to Troubleshoot.
Practise PCNSE questions linked to PCNSE fundamentals.
Practise PCNSE questions linked to PCNSE scenario.
Practise PCNSE questions linked to PCNSE troubleshooting.
Practice this exam
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Deploy and Configure Firewalls — This question tests Deploy and Configure Firewalls — Read the scenario before looking for a memorised answer..
The correct answer is: HA session sync — Option C is correct because HA session synchronization (session sync) is the feature that replicates active session state from the active firewall to the passive firewall in an active-passive HA pair. Without this configuration, after a failover the new active firewall has no knowledge of existing sessions, causing all active connections to be dropped and requiring clients to re-establish them. Enabling session sync ensures the passive firewall maintains a synchronized session table, allowing seamless traffic continuation after failover.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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 →
Last reviewed: Jun 25, 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.
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.