The answer is to enable the NTP service under Device > Setup > Services. This is correct because configuring NTP servers alone does not activate time synchronization on a Palo Alto Networks firewall; the NTP service acts as a master switch that must be explicitly turned on before the firewall will query those servers. Without this service enabled, the firewall ignores the NTP configuration entirely, even if the servers are reachable and correctly specified. On the PCNSA exam, this question tests your understanding of the separation between configuration and service activation—a common trap where candidates assume adding server IPs is sufficient. The exam often presents a screenshot of correctly entered NTP servers, then asks why time is not syncing, with the correct answer being the missing service toggle. A helpful memory tip: think of it like a light switch—you can wire the bulb (configure servers), but nothing happens until you flip the switch (enable the service).
PCNSA Device Management and Services Practice Question
This PCNSA practice question tests your understanding of device management and services. 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.
Exhibit
Refer to the exhibit.
```
set deviceconfig setting ntp server "pool.ntp.org"
set deviceconfig setting ntp server "time.google.com"
set deviceconfig setting ntp sync-interval 30
```
An administrator configured NTP servers as shown. After committing, the firewall's time is not synchronized. Which additional configuration is required?
Refer to the exhibit.
```
set deviceconfig setting ntp server "pool.ntp.org"
set deviceconfig setting ntp server "time.google.com"
set deviceconfig setting ntp sync-interval 30
```
A
Configure an authentication key
Why wrong: Optional, not required for basic sync.
B
Set time zone manually
Why wrong: Time zone does not affect NTP synchronization.
C
Enable NTP service under Device > Setup > Services
The NTP service must be enabled to allow synchronization.
D
Specify a source interface for NTP
Why wrong: Optional, only needed if multiple interfaces.
E
Restart NTP service
Why wrong: Service is not running; it needs to be enabled first.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable NTP service under Device > Setup > Services
Option C is correct because the NTP service must be explicitly enabled on the firewall under Device > Setup > Services before it will synchronize time with any configured NTP servers. Without enabling the NTP service, the firewall ignores the NTP server configuration entirely, even if the servers are reachable and correctly specified.
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 NTP service under Device > Setup > Services
Why this is correct
The NTP service must be enabled to allow synchronization.
Related concept
Read the scenario before looking for a memorised answer.
✗
Specify a source interface for NTP
Why it's wrong here
Optional, only needed if multiple interfaces.
✗
Restart NTP service
Why it's wrong here
Service is not running; it needs to be enabled first.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates assume simply configuring NTP server IP addresses under Device > Setup > NTP is sufficient, but Palo Alto Networks requires an explicit enable step under Device > Setup > Services to activate the NTP client service.
Detailed technical explanation
How to think about this question
The NTP service on Palo Alto Networks firewalls is disabled by default to reduce the attack surface. When enabled, the firewall uses NTPv4 (RFC 5905) to synchronize its system clock with the configured servers, sending periodic NTP queries on UDP port 123. A common real-world scenario is that administrators configure NTP servers but forget to enable the service, leading to time drift that can cause issues with certificate validation, logging timestamps, and authentication protocols like Kerberos.
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 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 exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Device Management and Services — This question tests Device Management and Services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable NTP service under Device > Setup > Services — Option C is correct because the NTP service must be explicitly enabled on the firewall under Device > Setup > Services before it will synchronize time with any configured NTP servers. Without enabling the NTP service, the firewall ignores the NTP server configuration entirely, even if the servers are reachable and correctly specified.
What should I do if I get this PCNSA 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 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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