GIAC GNFA Exam Questions : GIAC Network Forensic Analyst (GNFA)

  • Exam Code: GNFA
  • Exam Name: GIAC Network Forensic Analyst (GNFA)
  • Updated: Aug 31, 2026
  • Q&As: 97 Questions and Answers

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GIAC GNFA Exam Syllabus Topics:

SectionObjectives
Topic 1: Packet Capture and Traffic Analysis- Traffic inspection tools
  • 1. Protocol decoding and inspection
    • 2. Wireshark analysis workflows
      - Packet acquisition techniques
      • 1. tcpdump usage and filtering
        • 2. PCAP collection best practices
          Topic 2: Network Forensic Investigation- Incident reconstruction
          • 1. Attribution and artifact correlation
            • 2. Timeline creation from PCAP/logs
              - Evidence handling
              • 1. Chain of custody considerations
                • 2. Data integrity validation
                  Topic 3: Network Intrusion Detection and Analysis- IDS/IPS interpretation
                  • 1. Signature vs anomaly detection
                    • 2. Alert triage and validation
                      - Malicious traffic identification
                      • 1. Command and control detection patterns
                        • 2. Lateral movement indicators
                          Topic 4: Incident Response and Reporting- Response workflow
                          • 1. Network-based investigation integration
                            • 2. Containment and eradication support
                              - Reporting and documentation
                              • 1. Technical reporting structure
                                • 2. Executive-level summarization
                                  Topic 5: Network Fundamentals for Forensics- TCP/IP protocol suite understanding
                                  • 1. IP addressing and subnetting
                                    • 2. TCP vs UDP behavior analysis
                                      - Network architecture and traffic flow
                                      • 1. Client-server communication patterns
                                        • 2. Network segmentation and visibility
                                          Topic 6: Network Protocol Analysis- Application layer protocols
                                          • 1. HTTP/HTTPS traffic analysis
                                            • 2. DNS query and response forensics
                                              - Transport and session behavior
                                              • 1. Session reconstruction techniques
                                                • 2. TLS/SSL inspection concepts

                                                  GIAC Network Forensic Analyst (GNFA) Sample Questions:

                                                  Question 1

                                                  Which challenges are commonly encountered when reverse engineering network protocols?
                                                  (Select two.)
                                                  Response:

                                                  A. Use of default ports
                                                  B. Standardized communication patterns
                                                  C. Lack of documentation
                                                  D. Presence of encryption


                                                  Question 2

                                                  Which wireless security protocol is considered the most secure for enterprise environments?
                                                  Response:

                                                  A. WEP
                                                  B. WPA
                                                  C. WPA3-Enterprise
                                                  D. WPA2-PSK


                                                  Question 3

                                                  Which protocol is commonly used for transmitting log data between devices and centralized logging servers?
                                                  Response:

                                                  A. FTP
                                                  B. POP3
                                                  C. HTTP
                                                  D. Syslog


                                                  Question 4

                                                  Which of the following are characteristics of the TCP protocol?
                                                  (Select two.)
                                                  Response:

                                                  A. Best-effort delivery
                                                  B. Connection-oriented communication
                                                  C. Used for real-time applications
                                                  D. Reliable data transfer


                                                  Question 5

                                                  What is the role of dynamic analysis in network protocol reverse engineering?
                                                  Response:

                                                  A. It analyzes live network traffic to understand protocol behavior
                                                  B. It uses brute force attacks to identify weaknesses
                                                  C. It inspects logs for forensic investigations
                                                  D. It involves executing malware to observe its behavior


                                                  Solutions:

                                                  Question 1
                                                  Answer: C,D
                                                  Question 2
                                                  Answer: C
                                                  Question 3
                                                  Answer: D
                                                  Question 4
                                                  Answer: B,D
                                                  Question 5
                                                  Answer: A

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