Match each firewall deployment mode to its description.
Drag a concept onto its matching description — or click a concept then click the description.
Passively monitors traffic without blocking
Transparent layer 2 deployment
Routable mode with IP addresses
Failover configuration with one standby unit
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Virtual Wire mode: Pairs two interfaces to act as a wire, forwarding traffic transparently.
The correct matches are: Layer 2 mode is a transparent bridge based on MAC addresses; Virtual Wire mode pairs interfaces as a wire; Layer 3 mode routes based on IP; Tap mode passively monitors. Common confusions involve swapping Layer 2 and Virtual Wire definitions, or confusing Tap with Layer 3.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Layer 3 mode: Acts as a transparent bridge, forwarding traffic based on MAC addresses.
Why it's wrong here
Incorrect — this describes Layer 2 mode, not Layer 3 mode.
Virtual Wire mode: Pairs two interfaces to act as a wire, forwarding traffic transparently.
Why this is correct
Correct — Virtual Wire mode forwards traffic transparently between paired interfaces.
Tap mode: Routes traffic between different subnets using IP addresses.
Why it's wrong here
Incorrect — this describes Layer 3 mode, not Tap mode.
Layer 2 mode: Acts as a transparent bridge, forwarding traffic based on MAC addresses.
Why this is correct
Correct — Layer 2 mode is a transparent bridge that forwards traffic using MAC addresses.
Tap mode: Forwards traffic based on MAC addresses transparently.
Why it's wrong here
Incorrect — Tap mode passively monitors traffic and does not forward; this describes Layer 2 or Virtual Wire mode.
Quick reference
| Model | Acronym | Who Controls Access? | Best For |
|---|---|---|---|
| Discretionary Access Control | DAC | Resource owner | Small teams, file shares |
| Mandatory Access Control | MAC | System / security labels | Classified govt / military |
| Role-Based Access Control | RBAC | Administrator (via roles) | Enterprise environments |
| Attribute-Based Access Control | ABAC | Policy engine (user + resource attributes) | Fine-grained, dynamic policies |
| Rule-Based Access Control | RuBAC | System rules / ACLs | Firewall rules, network ACLs |
Go deeper
About these practice questions
Courseiva writes every PCNSA question from scratch — 516 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
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.