PCNSA Securing Traffic Practice Question
A company uses Palo Alto Networks firewall and wants to configure NAT to allow internal users to access the internet using a public IP address pool. Which NAT type should be used?
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
✓
Dynamic IP and Port (DIPP) with source NAT.
Dynamic IP and Port (DIPP) NAT allows multiple internal users to share a pool of public IP addresses by using port address translation, which is ideal for outbound internet access. Option B (Bidirectional NAT) is typically used for static 1-to-1 mappings that allow both inbound and outbound translation, not for sharing a pool of addresses. Option C (Static NAT with source NAT) is used for static mapping of a private IP to a public IP, primarily for inbound traffic, not for sharing a pool. Option D (Destination NAT with port forwarding) is used to forward specific inbound traffic to internal servers, not for outbound internet access.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Dynamic IP and Port (DIPP) with source NAT.
Why this is correct
DIPP translates internal IPs to public IPs with port multiplexing, suitable for outbound internet access.
- ✗
Bidirectional NAT.
Why it's wrong here
Bidirectional NAT combines source and destination NAT, but not typically used for outbound internet with a pool.
- ✗
Static NAT with source NAT.
Why it's wrong here
Static NAT provides 1-to-1 mapping, not suitable for sharing a pool.
- ✗
Destination NAT with port forwarding.
Why it's wrong here
Destination NAT is used for inbound traffic, not outbound.
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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.