GIAC GNFA : GIAC Network Forensic Analyst (GNFA)

GNFA real exams

Exam Code: GNFA

Exam Name: GIAC Network Forensic Analyst (GNFA)

Updated: Sep 06, 2026

Q & A: 97 Questions and Answers

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GIAC GNFA Exam Syllabus Topics:

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

                                                  GIAC Network Forensic Analyst (GNFA) Sample Questions:

                                                  Question 1

                                                  Which open-source tool is commonly used as a forward and reverse proxy for security analysis?
                                                  Response:

                                                  A. Wireshark
                                                  B. Burp Suite
                                                  C. Snort
                                                  D. Nessus


                                                  Question 2

                                                  Which of the following can be used to detect rogue access points in a wireless network?
                                                  Response:

                                                  A. Syslog
                                                  B. NetFlow
                                                  C. Wireshark
                                                  D. Wireless Intrusion Detection System (WIDS)


                                                  Question 3

                                                  Which security measures can help protect against deauthentication attacks?
                                                  (Select two.)
                                                  Response:

                                                  A. Disabling SSID broadcasting
                                                  B. Using MAC address filtering
                                                  C. Implementing WPA3
                                                  D. Enabling Management Frame Protection (MFP)


                                                  Question 4

                                                  Which protocol is commonly used for network device management and monitoring?
                                                  Response:

                                                  A. FTP
                                                  B. DHCP
                                                  C. SNMP
                                                  D. HTTP


                                                  Question 5

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

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


                                                  Solutions:

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

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