Quick Answer
The answer is that the '4' specifies the maximum number of packets to capture. This fourth parameter in the diagnose sniffer packet command directly controls how many packets the sniffer will display before stopping, making it essential for limiting output during a focused traffic capture. On the Fortinet NSE 4 Network Security Professional NSE4 exam, this tests your ability to interpret command syntax for real-time troubleshooting, where misreading this parameter as a filter or interface count is a common trap. Remember that the command structure follows: interface, filter, verbose level, and finally count—so the number always comes last. A useful memory tip is to think of the '4' as the "fourth and final" parameter, which tells the sniffer when to quit, helping you diagnose sniffer packet command parameters without flooding your terminal.
This NSE4 practice question tests your understanding of high availability and diagnostics. 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.
A network administrator runs the following CLI command on a FortiGate to capture traffic for troubleshooting: 'diagnose sniffer packet any "host 10.0.1.100" 4'. What does the '4' at the end of the command specify?
The filter verbosity level
Why wrong: Verbosity is the third parameter (e.g., 1=header, 2=header+hex, 3=header+hex+ASCII, 4=detailed).
The maximum number of packets to capture
The last parameter is count, which limits the number of packets captured.
The time duration in seconds
Why wrong: There is no time duration parameter; the count parameter limits packets.
The interface index
Why wrong: Interface is the first parameter, not the number.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
The maximum number of packets to capture
The fourth parameter in the diagnose sniffer packet command specifies the number of packets to capture.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
The filter verbosity level
Why it's wrong here
Verbosity is the third parameter (e.g., 1=header, 2=header+hex, 3=header+hex+ASCII, 4=detailed).
The maximum number of packets to capture
Why this is correct
The last parameter is count, which limits the number of packets captured.
Related concept
Read the scenario before looking for a memorised answer.
The time duration in seconds
Why it's wrong here
There is no time duration parameter; the count parameter limits packets.
The interface index
Why it's wrong here
Interface is the first parameter, not the number.
Common exam traps
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
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.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
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.
High Availability and Diagnostics — study guide chapter
Learn the concepts, then practise the questions
High Availability and Diagnostics practice questions
Targeted practice on this topic area only
All NSE4 questions
1,000 questions across all exam domains
Fortinet NSE 4 Network Security Professional NSE4 study guide
Full concept coverage aligned to exam objectives
NSE4 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Practise NSE4 questions linked to System and Network Administration.
Practise NSE4 questions linked to Firewall Policies and NAT.
Practise NSE4 questions linked to Authentication and VPN.
Practise NSE4 questions linked to Security Profiles.
Practise NSE4 questions linked to High Availability and Diagnostics.
Practise NSE4 questions linked to NSE4 fundamentals.
Practise NSE4 questions linked to NSE4 scenario.
Practise NSE4 questions linked to NSE4 troubleshooting.
Practice this exam
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
High Availability and Diagnostics — This question tests High Availability and Diagnostics — Read the scenario before looking for a memorised answer..
The correct answer is: The maximum number of packets to capture — The fourth parameter in the diagnose sniffer packet command specifies the number of packets to capture.
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.
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 →
Same concept, more angles
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. A FortiGate administrator needs to capture packets on the DMZ interface to troubleshoot a connectivity issue. Which CLI command should be used to start a packet capture?
easyWhy A: The command 'diagnose sniffer packet' is used for packet capture on FortiGate interfaces.
Variation 2. A FortiGate administrator needs to capture packets on interface port2 for 10 seconds to diagnose a connectivity issue. Which command should the administrator use?
easyWhy B: The 'diagnose sniffer packet' command is used to capture packets on a FortiGate. The syntax 'diagnose sniffer packet any "" 4 10' captures on all interfaces for 10 seconds with verbose output.
Variation 3. An administrator wants to capture HTTP traffic on port1 for troubleshooting. Which CLI command should be used?
easyWhy D: The 'diagnose sniffer packet' command is used to capture packets in FortiGate CLI.
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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.