Cybersecurity-Practitioner Network Security Practice Question
An administrator needs to configure a security rule that applies specifically to traffic destined for a DMZ web server using its public NAT IP address (Destination NAT). Which IP address must be specified in the Destination field of the Security policy rule?
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 public pre-NAT IP address assigned to the external interface.
Security rules must always reference the pre-NAT (original destination) IP address when evaluating incoming traffic from the untrusted zone, unless specified otherwise depending on PAN-OS version, but standard best practice dictates matching the zone and the pre-NAT destination IP address.
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 public pre-NAT IP address assigned to the external interface.
Why this is correct
Security rules evaluate traffic using the original destination IP address (pre-NAT).
- ✗
The loopback interface IP address of the firewall.
Why it's wrong here
Loopback addresses are used for management or routing, not standard DNAT mappings.
- ✗
The MAC address of the DMZ server.
Why it's wrong here
Security rules do not match on layer 2 MAC addresses.
- ✗
The private post-NAT IP address of the internal web server.
Why it's wrong here
Security policy evaluation occurs before Destination NAT takes place in the packet flow.
Visual reference
About these practice questions
This Cybersecurity-Practitioner question is part of Courseiva's 206-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official Palo Alto Networks exam blueprint
This Cybersecurity-Practitioner 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 Cybersecurity-Practitioner exam.