PCNSA Managing Objects Practice Question
An administrator has created an address group that includes an FQDN address object. When the FQDN's IP address changes, how does the firewall update the group?
⚠ Common exam trap
Test-takers frequently think FQDNs require manual updates or that only dynamic groups support automatic resolution, but Palo Alto firewalls resolve FQDNs at commit for any group type.
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
✓
The firewall automatically resolves the FQDN at commit and updates the group accordingly.
Palo Alto Networks firewalls automatically resolve FQDNs at commit time. When an FQDN address object is included in an address group, the firewall performs a DNS resolution during the commit process and updates the group with the current IP address(es). This ensures that the group reflects the latest IP mapping without requiring manual intervention.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The administrator must manually update the address object's IP address.
Why it's wrong here
The firewall re-resolves the FQDN automatically and updates the address object and any group containing it; no manual edit is required. It is tempting because static objects normally need manual changes, but FQDN objects refresh from DNS resolution on their configured interval.
- ✗
Only if the address group is dynamic will the update occur automatically.
Why it's wrong here
Static address groups also refresh when a member FQDN object's resolved IP changes; the firewall re-resolves the FQDN and updates the group regardless of whether it is static or dynamic. It is tempting because dynamic groups auto-update membership, but that concerns membership criteria, not FQDN resolution.
- ✗
FQDN objects cannot be included in address groups.
Why it's wrong here
FQDN address objects can be members of address groups; PAN-OS resolves the FQDN and the group reflects the resolved addresses. It is tempting because static groups do not auto-refresh membership, but that concerns group type, not whether FQDN objects are permitted members.
- ✓
The firewall automatically resolves the FQDN at commit and updates the group accordingly.
Why this is correct
FQDN address objects are resolved through DNS at commit time, and the resulting IP addresses populate any group referencing them. When the FQDN's records change, the next commit re-resolves and refreshes the group membership automatically, requiring no manual edit.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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