- A
2000 ms
Why wrong: Too slow, failover may be delayed.
- B
It should be left at the default value and not changed
Why wrong: While default is recommended, this option implies no change, but the question asks for the value.
- C
500 ms
Why wrong: Too aggressive, may cause false positives.
- D
1000 ms
Default and recommended for stability.
Question 394 of 516
Recommended HA2 Keepalive Timer for Active/Passive HA
This PCNSE practice question tests your understanding of managing troubleshooting and high availability. 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.
What is the recommended best practice for the HA2 keepalive timer in an active/passive HA configuration?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"best"Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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
✓
1000 ms
In an active/passive HA configuration, the HA2 keepalive timer should be set to 1000 ms (1 second) as a best practice. This value provides a balance between fast failover detection and network stability, ensuring that the passive firewall can detect a failure of the active firewall within a reasonable timeframe without causing false positives due to transient network issues.
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.
- ✗
2000 ms
Why it's wrong here
Too slow, failover may be delayed.
- ✗
It should be left at the default value and not changed
Why it's wrong here
While default is recommended, this option implies no change, but the question asks for the value.
- ✗
500 ms
Why it's wrong here
Too aggressive, may cause false positives.
- ✓
1000 ms
Why this is correct
Default and recommended for stability.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse the HA2 keepalive timer with the HA1 backup link timer or assume a lower value always improves performance, ignoring the risk of false failovers due to network jitter.
Detailed technical explanation
How to think about this question
The HA2 keepalive timer controls how often the passive firewall sends keepalive packets to the active firewall to verify its health. Under the hood, if three consecutive keepalives are missed (based on the HA2 keepalive count, default 3), the passive firewall initiates a failover. In a real-world scenario with high-latency links, a 500 ms timer combined with the default count could cause unnecessary failovers during brief congestion, while 1000 ms provides a safer margin without compromising failover speed.
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.
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Managing Troubleshooting and High Availability — study guide chapter
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FAQ
Questions learners often ask
What does this PCNSE question test?
Managing Troubleshooting and High Availability — This question tests Managing Troubleshooting and High Availability — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: 1000 ms — In an active/passive HA configuration, the HA2 keepalive timer should be set to 1000 ms (1 second) as a best practice. This value provides a balance between fast failover detection and network stability, ensuring that the passive firewall can detect a failure of the active firewall within a reasonable timeframe without causing false positives due to transient network issues.
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.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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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