PCNSA Managing Objects Practice Question
During a security audit, an administrator notices that a security policy rule uses an address group that includes an FQDN object. The FQDN resolves to multiple IP addresses that change frequently. What is the best practice for ensuring the firewall uses the current resolved IPs without manual intervention?
⚠ Common exam trap
Watch out — candidates often think FQDN objects require manual IP updates or that dynamic address groups can perform DNS resolution, but in reality, only FQDN objects provide automatic, runtime DNS resolution without manual intervention.
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
✓
Use an FQDN object in the address group; the firewall resolves it automatically
Palo Alto Networks firewalls automatically resolve FQDN objects to their current IP addresses at runtime, without requiring manual updates. When an FQDN object is used in an address group, the firewall performs DNS resolution each time the policy is evaluated, ensuring that the latest IP addresses are used even if they change frequently.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use a region object instead
Why it's wrong here
Regions are geographical, not suitable for FQDNs.
- ✗
Create a dynamic address group with a tag-based filter
Why it's wrong here
Dynamic groups filter based on tags, not FQDN resolution.
- ✓
Use an FQDN object in the address group; the firewall resolves it automatically
Why this is correct
FQDN objects automatically resolve and update IPs.
- ✗
Manually add all possible IP addresses to an address group
Why it's wrong here
Not scalable and misses new IPs.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.