- A
Virtual routers
Virtual routers handle routing and can direct traffic into and out of VPN tunnels.
- B
Virtual wires
Why wrong: Virtual wires are for transparent Layer 2 deployments, not routing.
- C
Security policies
Why wrong: Security policies enforce rules but do not perform routing.
- D
Interface management profiles
Why wrong: Management profiles control access to management functions, not routing.
Question 358 of 529
PCNSA Palo Alto Networks Platforms and Architecture Practice Question
This PCNSA practice question tests your understanding of palo alto networks platforms and architecture. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company is expanding its network and needs to add a new data center. The two data centers will be connected via a WAN link. To protect the traffic between data centers, the security team wants to use site-to-site VPNs. Which Palo Alto Networks feature is used to route traffic between VPN tunnels and security zones?
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
✓
Virtual routers
Virtual routers are the correct feature because they function as Layer 3 routing instances within Palo Alto Networks firewalls, enabling the routing of traffic between VPN tunnels (which terminate on tunnel interfaces) and security zones. When a site-to-site VPN is configured, the tunnel interface is assigned to a virtual router, which then uses static or dynamic routing protocols (e.g., BGP, OSPF) to forward traffic between the tunnel and the zone's egress interface. This allows the firewall to make forwarding decisions between the encrypted VPN path and the protected internal network segments.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Virtual routers
Why this is correct
Virtual routers handle routing and can direct traffic into and out of VPN tunnels.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Virtual wires
Why it's wrong here
Virtual wires are for transparent Layer 2 deployments, not routing.
- ✗
Security policies
Why it's wrong here
Security policies enforce rules but do not perform routing.
- ✗
Interface management profiles
Why it's wrong here
Management profiles control access to management functions, not routing.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse security policies with routing decisions, mistakenly thinking that policies control traffic flow between zones, when in fact virtual routers handle the actual Layer 3 forwarding and path selection between VPN tunnels and security zones.
Detailed technical explanation
How to think about this question
Under the hood, a virtual router maintains its own routing table and can participate in dynamic routing protocols like BGP or OSPF, allowing it to exchange routes with the remote data center's virtual router over the VPN tunnel interface. A subtle behavior is that if multiple virtual routers are configured, traffic must be explicitly routed between them using route leaking or inter-virtual-router routing, which is critical in multi-tenant or segmented environments. In a real-world scenario, if the WAN link fails, the virtual router can failover to a backup VPN tunnel via route metrics or BGP path selection, ensuring high availability between data centers.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A network engineer at a university connects two campus buildings via a fibre link. Both routers run OSPF, but no adjacency forms — even though both routers can ping each other. The engineer finds one router is in area 0 and the other in area 1. OSPF adjacency requires matching area numbers, hello/dead timers, and network type. IP reachability alone is not enough.
Visual reference
Quick reference
Routing Protocol Comparison
| Protocol | Metric | Max Hops | Algorithm | Type |
|---|---|---|---|---|
| RIP v2 | Hop count | 15 | Bellman-Ford | Distance vector |
| OSPF | Cost (bandwidth) | Unlimited | Dijkstra (SPF) | Link state |
| EIGRP | Composite metric | Unlimited | DUAL | Hybrid |
| IS-IS | Cost | Unlimited | Dijkstra | Link state |
| BGP | Policy / attributes | Unlimited | Path vector | Path vector |
RIP's 15-hop limit makes it unsuitable for large networks. OSPF and EIGRP dominate modern enterprise deployments.
What to study next
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FAQ
Questions learners often ask
What does this PCNSA question test?
Palo Alto Networks Platforms and Architecture — This question tests Palo Alto Networks Platforms and Architecture — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Virtual routers — Virtual routers are the correct feature because they function as Layer 3 routing instances within Palo Alto Networks firewalls, enabling the routing of traffic between VPN tunnels (which terminate on tunnel interfaces) and security zones. When a site-to-site VPN is configured, the tunnel interface is assigned to a virtual router, which then uses static or dynamic routing protocols (e.g., BGP, OSPF) to forward traffic between the tunnel and the zone's egress interface. This allows the firewall to make forwarding decisions between the encrypted VPN path and the protected internal network segments.
What should I do if I get this PCNSA question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 25, 2026
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.
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