GIAC Network Forensic Analyst (GNFA): GNFA Exam

"GIAC Network Forensic Analyst (GNFA)", also known as GNFA exam, is a GIAC Certification. With the complete collection of questions and answers, Pass4sureCert has assembled to take you through 97 Q&As to your GNFA Exam preparation. In the GNFA exam resources, you will cover every field and category in Digital Forensics Certification helping to ready you for your successful GIAC Certification.

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  • Exam Code: GNFA
  • Exam Name: GIAC Network Forensic Analyst (GNFA)
  • Certification Provider: GIAC
  • Corresponding Certification: Digital Forensics
  • Updated: Sep 23, 2026
  • No. of Questions: 97 Questions & Answers with Testing Engine
  • Download Limit: Unlimited

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GIAC GNFA Exam Syllabus Topics:

SectionObjectives
Network Fundamentals for Forensics- Network architecture and traffic flow
  • 1. Network segmentation and visibility
    • 2. Client-server communication patterns
      - TCP/IP protocol suite understanding
      • 1. IP addressing and subnetting
        • 2. TCP vs UDP behavior analysis
          Network Protocol Analysis- Application layer protocols
          • 1. DNS query and response forensics
            • 2. HTTP/HTTPS traffic analysis
              - Transport and session behavior
              • 1. TLS/SSL inspection concepts
                • 2. Session reconstruction techniques
                  Packet Capture and Traffic Analysis- Traffic inspection tools
                  • 1. Protocol decoding and inspection
                    • 2. Wireshark analysis workflows
                      - Packet acquisition techniques
                      • 1. PCAP collection best practices
                        • 2. tcpdump usage and filtering
                          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
                                  Network Intrusion Detection and Analysis- IDS/IPS interpretation
                                  • 1. Signature vs anomaly detection
                                    • 2. Alert triage and validation
                                      - Malicious traffic identification
                                      • 1. Lateral movement indicators
                                        • 2. Command and control detection patterns
                                          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

                                                  GIAC Network Forensic Analyst (GNFA) Sample Questions:

                                                  Which of the following network protocols is commonly used for email transmission over the internet?
                                                  Response:

                                                  • A. HTTP
                                                  • B. SMTP
                                                  • C. FTP
                                                  • D. SNMP
                                                  Reveal Solution  Discussion  0

                                                  Correct Answer: B  🗳️

                                                  Which of the following is a benefit of using a transparent proxy?
                                                  Response:

                                                  • A. It does not require client-side configuration
                                                  • B. It blocks all traffic from unknown sources
                                                  • C. It encrypts all internet traffic by default
                                                  • D. It eliminates the need for network monitoring
                                                  Reveal Solution  Discussion  0

                                                  Correct Answer: A  🗳️

                                                  What is the primary goal of network protocol reverse engineering?
                                                  Response:

                                                  • A. To analyze and understand undocumented or proprietary protocols
                                                  • B. To replace network firewalls with better security
                                                  • C. To design new network protocols
                                                  • D. To encrypt network traffic for security purposes
                                                  Reveal Solution  Discussion  0

                                                  Correct Answer: A  🗳️

                                                  A network administrator is investigating slow network performance and suspects excessive broadcast traffic. The admin captures packets and sees that a large number of ARP requests are being sent. Which of the following attacks is most likely occurring?
                                                  Response:

                                                  • A. DNS Spoofing
                                                  • B. ARP Poisoning
                                                  • C. ICMP Flood
                                                  • D. TCP SYN Flood
                                                  Reveal Solution  Discussion  0

                                                  Correct Answer: B  🗳️

                                                  A security analyst detects an application sending large volumes of encoded traffic to a remote server over an uncommon port. The analyst suspects data exfiltration. What should be done next?
                                                  Response:

                                                  • A. Immediately block the port on the firewall
                                                  • B. Terminate all active network sessions
                                                  • C. Assume the traffic is normal and ignore it
                                                  • D. Investigate the encoding scheme used in the traffic
                                                  Reveal Solution  Discussion  0

                                                  Correct Answer: D  🗳️

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