Wireshark WCNA Practice Exam Questions & Answers
7 Free Questions
· Last reviewed: October 23, 2026
· Prepared & Reviewed by the ValidExamDumps Editorial Team
Exam Facts
Wireshark WCNA Exam Details
Key details for this exam, checked against the published exam outline
100
Practice Questions (Our Bank)
120 minutes
Exam Duration
USD 299
Official Exam Fee
- Exam Code
- WCNA
- Full Name
- Worldwide Certified Network Analyst (WCNA) Certification
- Issuing Body
- Protocol Analysis Institute, Inc.
- Question Format (Our Bank)
- Multiple Choice
- Passing Score
- Pass/Fail with equated scoring values per question
- Delivery
- KRYTERION High-stake Online Secure Testing (HOST) centre locations or online proctored
- Eligibility
- None specified
- Validity
- 3 years from successful exam completion, then recertification exam required
Practice Questions
Free WCNA Practice Questions
Each question shows the correct answer and an explanation of why it is right
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Every question and its answer is checked by our WCNA exam
preparation team, who also write the explanation shown with each one.
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Which statement about ICMP is true?
Correct Answer:
D
Explanation
Applications can bind to network ports and override the default assignments specified in the TCP/IP stack services file. This is why you might see HTTP traffic on a non-standard port or FTP running on an unusual port number. The application layer has the ability to use any port it wants regardless of what the operating system defines as the standard service port.
Null scans use legal TCP packet formats, but listen for illegally-formed TCP response packets.
Correct Answer:
B
Explanation
When you have thousands of packets, visually spotting time gaps is nearly impossible. By setting the Time column to display seconds since the previously displayed packet, gaps become visible as large numbers. Sorting this column puts the biggest gaps at the top or bottom depending on sort direction, making them jump out immediately. This technique beats scrolling through or using other columns.
In the case of a high latency path, more than three identical ACKs may be sent before the retransmission is seen in a trace file.
Correct Answer:
A
Explanation
TCP includes sequence numbers in every segment so the receiving end can track which data has arrived and in what order. Each side acknowledges the data it receives by sending back the sequence number of the next byte it expects. This mechanism ensures reliable, ordered delivery even if packets arrive out of sequence or get lost on the network.
The gratuitous ARP process is not required if a host is configured with a static IP address.
Correct Answer:
B
Explanation
The acknowledgment number tells the sender what sequence number the receiver expects next from them. It confirms that all data up to one byte before the acknowledgment number has been successfully received. This is how TCP provides reliability. The field does not indicate what the receiver is sending, nor does it acknowledge what the receiver has sent.
What is the maximum MAC Service Data Unit (MSDU) size defined by the IEEE 802.11 specification?
Correct Answer:
A
Explanation
This question requires analyzing exhibit traffic to identify its purpose. The correct answer indicates network scanning activity designed to discover which IP-based protocols or services are running on a target system. This is a reconnaissance technique used in network security assessment or attack preparation. Understanding how scanning activity appears in traffic captures is essential for detecting suspicious behavior.
By default, Mergecap combines trace files based on the order they are listed on the command-line.
Correct Answer:
B
Explanation
Wireshark lets you customize the packet list display by dragging column headers to reorder them. You can grab any column in the Packet List pane and drag it left or right to change its position. This is one of the key customization features that network analysts use to arrange the packet information they need most in their preferred order for efficient analysis.
To increase the number of recently created display filters that Wireshark remembers, increase the Filter display max, list entries value in Wireshark's Preferences window.
Correct Answer:
A
Full Access
Get the complete WCNA question set
- 100 questions covering all exam domains
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Domain 1: Network Analysis and Wireshark Fundamentals
Evaluate foundational principles of network analysis including the purpose of analysis, troubleshooting various issues, and determining optimal locations and timings for traffic capture. This section forms the foundation for understanding how to use protocol analyzers effectively.
Sample question from this domain above:
Q7
Domain 2: Capture Configuration and Customization
Assess key skills in analyzer setup and customization such as configuring capture filters, adjusting global preferences, and interpreting time values. These capabilities are essential for network security professionals who need to tailor their analysis environment.
Sample question from this domain above:
Q6
Domain 3: Statistics and Display Filters
Test your ability to interpret statistics from trace files, create effective display filters, and utilize the expert system. This includes tracking streams, reassembling data, and customizing profiles for efficient workflow during network analysis.
Sample question from this domain above:
Q2
Domain 4: TCP/IP Protocol Analysis
Focus on analyzing fundamental network protocols like DNS, ARP, and IP traffic. Candidates must demonstrate a strong grasp of basic TCP/IP functionalities and multi-step resolution processes typical in network analysis.
Domain 5: Transport Layer Protocol Analysis
Address the analysis of transport layer protocols including ICMP, UDP, and TCP traffic. Professionals must showcase the ability to evaluate normal communication patterns and understand processes like connection establishment.
Sample questions from this domain above:
Q3Q4
Domain 6: Application Protocol Analysis
Analyze traffic from application-level protocols such as DHCP, HTTP, FTP, and email. Expertise in graphing input and output rates and troubleshooting protocol-specific issues is essential for success in this area.
Sample question from this domain above:
Q1
Domain 7: Wireless and VoIP Analysis
Emphasize the analysis of 802.11 WLAN and VoIP traffic. Network analysts are expected to demonstrate skills in capturing WLAN traffic, analyzing signal strength, and understanding the flow of VoIP communication.
Domain 8: Performance Analysis and Baselining
Focus on identifying standard traffic patterns and diagnosing performance-related issues. Professionals must display the ability to establish protocol baselines and troubleshoot performance challenges effectively.
Domain 9: Network Forensics and Security
Test understanding of network forensics including detecting scanning activities and analyzing suspicious traffic patterns to ensure network integrity. This section is critical for security-focused network analysts.
Sample question from this domain above:
Q5
Domain 10: Command-Line Tools and Advanced Features
Evaluate proficiency in using command-line tools like Wireshark.exe and Tshark. Candidates must demonstrate competence in leveraging these tools for advanced network analysis tasks beyond the graphical interface.
FAQ
WCNA Exam FAQ
Common questions about the exam itself
What background do I need to sit the WCNA exam?
The WCNA has no formal prerequisites. However, candidates should have practical experience with network troubleshooting and basic knowledge of TCP/IP protocols before attempting the exam.
How difficult is the WCNA certification compared to other networking certs?
The WCNA is a specialized, technical certification focused on protocol analysis with a practical bent. It differs from broader networking certifications like CCNA by concentrating on traffic analysis and forensics rather than network infrastructure design.
How many questions are on the WCNA exam and how long do I have?
The WCNA exam consists of 100 closed-book questions with a 2 hour time limit. The exam uses equated scoring where each question has different point values based on difficulty.
What's the passing score for the WCNA exam?
The WCNA is a Pass/Fail exam and the vendor does not publish a specific numeric passing score. Instead, scoring is calculated by equating the values of each question you answer correctly.
How long does WCNA certification stay valid?
Your WCNA certification is valid for 3 years from the date you pass the exam. After 3 years, you must take the WCNA Recertification Exam to maintain your certification status.
How do I take the WCNA exam and can I sit it from home?
You can take the exam at hundreds of KRYTERION testing centres worldwide, or online from home with biometric authentication and webcam proctoring. Register for either format at www.webassessor.com/pai.
How long does it realistically take to prepare for the WCNA exam?
Preparation time depends on your existing network knowledge and hands-on experience. Most candidates spend several weeks to a few months preparing through a combination of self-paced learning, the official study guide with practice questions, and practical lab work with trace files.
What can I expect on exam day for the WCNA?
You cannot bring personal items like phones, bags, calculators or watches. The exam is closed-book and you should bring photo identification. If taking the online proctored version, biometric verification and webcam monitoring are required as per Kryterion security protocols.
Is there a retake limit for the WCNA and how soon can I retake it?
The vendor does not publish a limit on retakes but you must wait 72 hours from your exam registration before scheduling your exam. Additional exam sittings are charged at the full USD 299 price.
What job role does the WCNA certification support?
The WCNA is designed for network analysts, cybersecurity professionals, and network forensics specialists who need expertise in analyzing packets and protocols for troubleshooting, optimization, and security investigations.
