The answer is that the SSL inspection profile is set to certificate-inspection only, which prevents DLP from decrypting and scanning the email content. DLP relies on deep packet inspection to read the payload of encrypted traffic; when SSL inspection is limited to verifying the certificate without decrypting the data, the FortiGate cannot see the credit card numbers inside the email body, so no violations are logged. On the Fortinet NSE 4 exam, this scenario tests your understanding that DLP and other content-based security features require full SSL inspection (deep inspection) to function on encrypted traffic—a common trap is assuming certificate inspection is sufficient for data loss prevention. Remember the key distinction: certificate inspection only validates the certificate, while deep inspection decrypts the traffic for content analysis. A helpful memory tip is "No decrypt, no detect"—if the traffic stays encrypted, DLP remains blind to the data inside.
NSE4 Security Profiles Practice Question
This NSE4 practice question tests your understanding of security profiles. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 configures a data leak prevention (DLP) profile to detect credit card numbers in outgoing emails. However, no violations are logged. The email filter profile is applied with the DLP profile on the same policy. 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 SSL inspection profile on the policy is set to 'certificate-inspection' only
DLP scanning requires that the traffic be inspected. If the traffic is encrypted and not decrypted, DLP cannot see the content.
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 credit card numbers are being sent in PDF attachments, which are not scanned
Why it's wrong here
DLP can scan attachments depending on configuration.
✗
The DLP profile is not applied to SMTP traffic
Why it's wrong here
DLP profiles can be applied to any protocol. The issue is likely encryption.
✗
The FortiGate needs a FortiSandbox license for DLP to work
Why it's wrong here
DLP does not require FortiSandbox.
✓
The SSL inspection profile on the policy is set to 'certificate-inspection' only
Why this is correct
Email traffic may be encrypted via TLS. Certificate inspection does not decrypt traffic, so DLP cannot scan the content.
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.
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.
Security Profiles — This question tests Security Profiles — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The SSL inspection profile on the policy is set to 'certificate-inspection' only — DLP scanning requires that the traffic be inspected. If the traffic is encrypted and not decrypted, DLP cannot see the content.
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.
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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. An administrator configures a DLP profile to detect Social Security numbers in outbound traffic. The profile is applied to an outbound HTTP policy. Which TWO additional configurations are necessary for the DLP to inspect HTTPS traffic?
medium
A.Set the firewall policy inspection mode to proxy-based
B.Add an SSL exemption for the destination servers
✓ C.Enable SSL/TLS deep inspection on the firewall policy
✓ D.Create a DLP sensor with the correct pattern and apply it to the policy
E.Configure a web filter profile to allow the traffic
Why C: DLP scanning of HTTPS traffic requires SSL deep inspection to decrypt the traffic. Additionally, the firewall policy must have deep inspection enabled and the DLP profile must be applied. The inspection mode (flow vs proxy) may affect performance but both can work.
Last reviewed: Jun 21, 2026
Question Discussion
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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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