NSE4 System and Network Administration Practice Question
This NSE4 practice question tests your understanding of system and network administration. 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.
After upgrading FortiGate firmware from 6.0 to 7.2, an administrator notices that a static route pointing to a next-hop IP 10.0.0.1 is no longer working. The route is present in the configuration but the FortiGate shows it as 'not active'. What is the MOST likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The next-hop IP is not directly connected to any FortiGate interface
In FortiOS 7.2, a static route is considered 'active' only if the next-hop IP is reachable via a directly connected interface. If the next-hop IP 10.0.0.1 is not on a directly connected subnet, the route will be present in the configuration but marked as 'not active'. This is a fundamental routing principle: the next hop must be directly reachable (i.e., the router must have an ARP entry for it) for the route to be installed in the routing table.
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.
✗
FortiGate now requires a default administrative distance of 10 for static routes
Why it's wrong here
Default distance remains 10; this would not cause inactivity.
✗
The route was deleted during the upgrade and needs to be re-added
Why it's wrong here
Upgrades preserve configuration, so routes are not deleted.
✓
The next-hop IP is not directly connected to any FortiGate interface
Why this is correct
FortiGate requires static route next-hop to be directly connected. If the next-hop is not on a directly connected subnet, the route will be inactive.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The remote gateway is down
Why it's wrong here
If the remote gateway were down, the route might still be active if the interface is up; this is not the most likely cause.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume a static route will be active as long as the configuration is present and the remote gateway is reachable, but FortiGate (and most routers) require the next-hop IP to be directly connected for the route to be installed in the routing table.
Detailed technical explanation
How to think about this question
Under the hood, FortiGate uses the routing table's 'active' flag to indicate that the next hop is reachable via a directly connected interface (i.e., the next-hop IP is in the same subnet as an interface IP). This is enforced by the kernel's FIB (Forwarding Information Base) which requires a valid ARP entry for the next hop. In real-world scenarios, this often occurs when a static route points to a next hop that is behind a layer-2 switch or a different subnet, requiring a recursive route or a different next-hop IP.
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 segments a warehouse floor into three subnets: 20 scanners, 5 printers, and 2 management hosts. Picking the wrong mask wastes addresses or leaves too few usable hosts. Exam questions test whether you can apply CIDR notation, calculate block size, and identify the correct usable-host range for a given prefix.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
System and Network Administration — This question tests System and Network Administration — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The next-hop IP is not directly connected to any FortiGate interface — In FortiOS 7.2, a static route is considered 'active' only if the next-hop IP is reachable via a directly connected interface. If the next-hop IP 10.0.0.1 is not on a directly connected subnet, the route will be present in the configuration but marked as 'not active'. This is a fundamental routing principle: the next hop must be directly reachable (i.e., the router must have an ARP entry for it) for the route to be installed in the routing table.
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.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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