- A
The FortiGate must be a member of the Active Directory domain
Why wrong: The FortiGate does not need to join the domain; only the collector agent needs domain access.
- B
The users must authenticate via captive portal at least once
Why wrong: FSSO transparently captures AD logins; captive portal is not needed.
- C
The FortiGate must be able to reach the FSSO collector agent on TCP port 8000 (or the configured port)
The collector agent communicates with the FortiGate on a specific port (default 8000) to send login events.
- D
The firewall policies must use FSSO groups directly without any user objects
Why wrong: FSSO groups are used in policies, but user objects may also be involved; the key is that the group is based on FSSO authentication.
- E
The FSSO collector agent must have network access to the Active Directory domain controllers
The collector agent polls AD for login events; without access to DCs, it cannot capture logins.
Quick Answer
The answer is that the FSSO collector agent must have network access to the Active Directory domain controllers, and the FortiGate must be able to communicate with the collector agent. These two requirements are essential because the collector agent monitors domain controller security logs for user login events, then relays that authentication data to the FortiGate, which enforces firewall policies based on FSSO user groups. On the Fortinet NSE 4 exam, this question tests your understanding of the FSSO data flow: the collector agent acts as the bridge between AD and the FortiGate, so both network paths must be open. A common trap is assuming the FortiGate queries AD directly—it does not; the collector agent handles all domain communication. Remember the memory tip: “Collector connects to DC, FortiGate connects to Collector.”
NSE4 Authentication and VPN Practice Question
This NSE4 practice question tests your understanding of authentication and vpn. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 FortiGate administrator is configuring FSSO to authenticate users transparently. The FSSO collector agent is installed on a Windows server in the domain. Which TWO requirements must be met for FSSO to work correctly?
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
The FortiGate must be able to reach the FSSO collector agent on TCP port 8000 (or the configured port)
Options A and C are correct. The FortiGate must be able to communicate with the collector agent, and the collector agent must have access to Active Directory to monitor login events. Additionally, the FortiGate's firewall policies must use user groups based on FSSO authentication.
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.
- ✗
The FortiGate must be a member of the Active Directory domain
Why it's wrong here
The FortiGate does not need to join the domain; only the collector agent needs domain access.
- ✗
The users must authenticate via captive portal at least once
Why it's wrong here
FSSO transparently captures AD logins; captive portal is not needed.
- ✓
The FortiGate must be able to reach the FSSO collector agent on TCP port 8000 (or the configured port)
Why this is correct
The collector agent communicates with the FortiGate on a specific port (default 8000) to send login events.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
The firewall policies must use FSSO groups directly without any user objects
Why it's wrong here
FSSO groups are used in policies, but user objects may also be involved; the key is that the group is based on FSSO authentication.
- ✓
The FSSO collector agent must have network access to the Active Directory domain controllers
Why this is correct
The collector agent polls AD for login events; without access to DCs, it cannot capture logins.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- 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 practitioner preparing for the NSE4 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which NSE4 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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Authentication and VPN — study guide chapter
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Authentication and VPN practice questions
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FAQ
Questions learners often ask
What does this NSE4 question test?
Authentication and VPN — This question tests Authentication and VPN — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The FortiGate must be able to reach the FSSO collector agent on TCP port 8000 (or the configured port) — Options A and C are correct. The FortiGate must be able to communicate with the collector agent, and the collector agent must have access to Active Directory to monitor login events. Additionally, the FortiGate's firewall policies must use user groups based on FSSO authentication.
What should I do if I get this NSE4 question wrong?
Identify which NSE4 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jun 21, 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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