Question 1mediummultiple choice
Full question →Question 927 of 1,000
Quick Answer
The answer is Port Forwarding VIP. This is the correct choice because it performs a one-to-one destination NAT (DNAT) translation, mapping a single public IP and port (203.0.113.10:80) directly to a specific internal server’s IP and port (192.168.1.10:8080), which is exactly what the scenario requires for external HTTP access. On the Fortinet NSE 4 Network Security Professional NSE4 exam, this question tests your ability to distinguish between VIP types: Port Forwarding VIP is used for single-server, single-port translations, while a Load Balance VIP or Static NAT VIP would be incorrect here—Load Balance VIP distributes traffic across multiple servers, and Static NAT maps entire IPs without port translation. A common trap is confusing Port Forwarding VIP with Static NAT; remember that port forwarding always involves a port change, whereas Static NAT does not. Memory tip: “One server, one port, one public IP—think Port Forwarding VIP for the one-to-one trip.”
NSE4 Firewall Policies and NAT Practice Question
This NSE4 practice question tests your understanding of firewall policies and nat. 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.
An administrator needs to translate a single internal server (192.168.1.10:8080) to a public IP (203.0.113.10:80) so that external users can access it via HTTP. Which type of VIP should be configured?
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
✓
Port Forwarding VIP
Port Forwarding VIP (also called DNAT or destination NAT) is the correct choice because it translates a single internal server's IP and port (192.168.1.10:8080) to a specific public IP and port (203.0.113.10:80), allowing external HTTP users to reach the internal server. This is a one-to-one mapping of a public IP:port to a private IP:port, which is the exact definition of port forwarding in FortiGate.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Static NAT (one-to-one IP mapping) with Port Forwarding VIP, forgetting that Static NAT translates all ports and does not allow port remapping, while Port Forwarding VIP specifically handles port translation.
Detailed technical explanation
How to think about this question
In FortiGate, a Port Forwarding VIP is implemented as a DNAT rule in the firewall policy, where the destination IP and port are rewritten from 203.0.113.10:80 to 192.168.1.10:8080 before the packet is forwarded. This is commonly used to expose internal services like web servers or RDP on non-standard ports while presenting a standard port to the internet, and it requires a corresponding firewall policy to allow the traffic.
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 small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
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FAQ
Questions learners often ask
What does this NSE4 question test?
Firewall Policies and NAT — This question tests Firewall Policies and NAT — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Port Forwarding VIP — Port Forwarding VIP (also called DNAT or destination NAT) is the correct choice because it translates a single internal server's IP and port (192.168.1.10:8080) to a specific public IP and port (203.0.113.10:80), allowing external HTTP users to reach the internal server. This is a one-to-one mapping of a public IP:port to a private IP:port, which is the exact definition of port forwarding in FortiGate.
What should I do if I get this NSE4 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 24, 2026
This NSE4 practice question is part of Courseiva's free Fortinet 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 NSE4 exam.
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