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GIAC GNFA

GNFA

Exam Code: GNFA

Exam Name: GIAC Network Forensic Analyst (GNFA)

Updated: Oct 09, 2026

Q&A Number: 97 Q&As

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About GIAC GNFA Exam Questions and Answers

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GIAC GNFA Exam Syllabus Topics:

SectionObjectives
Topic 1: Incident Response and Reporting- Response workflow
  • 1. Containment and eradication support
    • 2. Network-based investigation integration
      - Reporting and documentation
      • 1. Technical reporting structure
        • 2. Executive-level summarization
          Topic 2: 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
                  Topic 3: Network Forensic Investigation- Incident reconstruction
                  • 1. Timeline creation from PCAP/logs
                    • 2. Attribution and artifact correlation
                      - Evidence handling
                      • 1. Chain of custody considerations
                        • 2. Data integrity validation
                          Topic 4: 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 5: Network Protocol Analysis- Transport and session behavior
                                  • 1. Session reconstruction techniques
                                    • 2. TLS/SSL inspection concepts
                                      - Application layer protocols
                                      • 1. DNS query and response forensics
                                        • 2. HTTP/HTTPS traffic analysis
                                          Topic 6: Network Intrusion Detection and Analysis- IDS/IPS interpretation
                                          • 1. Alert triage and validation
                                            • 2. Signature vs anomaly detection
                                              - Malicious traffic identification
                                              • 1. Lateral movement indicators
                                                • 2. Command and control detection patterns

                                                  GIAC Network Forensic Analyst (GNFA) Sample Questions:

                                                  Question #1
                                                  An administrator notices unusual traffic patterns where a single workstation is attempting to connect to multiple internal servers within minutes. What should be the first step in investigating this activity?
                                                  Response:

                                                  A. Analyze the NetFlow records and IDS alerts
                                                  B. Disable the workstation immediately
                                                  C. Review network segmentation policies
                                                  D. Block all outbound connections from the workstation


                                                  Question #2
                                                  Which of the following protocols provides secure file transfers by encrypting data during transmission?
                                                  Response:

                                                  A. HTTP
                                                  B. Telnet
                                                  C. FTP
                                                  D. SFTP


                                                  Question #3
                                                  Which of the following are characteristics of symmetric encryption?
                                                  (Select two.)
                                                  Response:

                                                  A. Requires a public-private key pair
                                                  B. Faster than asymmetric encryption
                                                  C. Uses a shared secret key
                                                  D. Uses digital signatures for verification


                                                  Question #4
                                                  What is the primary purpose of security event logging?
                                                  Response:

                                                  A. To replace the need for intrusion detection systems
                                                  B. To prevent all cyberattacks before they occur
                                                  C. To store all network activity indefinitely
                                                  D. To detect, investigate, and respond to security incidents


                                                  Question #5
                                                  Which security mechanisms are commonly implemented in proxy servers?
                                                  (Select two.)
                                                  Response:

                                                  A. Data loss prevention (DLP)
                                                  B. SSL/TLS decryption
                                                  C. Port mirroring
                                                  D. Network address translation (NAT)


                                                  Solutions:

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

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