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GIAC GNFA Practice Q&A's

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GIAC GNFA Exam Syllabus Topics:

SectionObjectives
Topic 1: Packet Capture and Traffic Analysis- Traffic inspection tools
  • 1. Wireshark analysis workflows
    • 2. Protocol decoding and inspection
      - Packet acquisition techniques
      • 1. PCAP collection best practices
        • 2. tcpdump usage and filtering
          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. TCP vs UDP behavior analysis
                • 2. IP addressing and subnetting
                  Topic 3: Incident Response and Reporting- Reporting and documentation
                  • 1. Technical reporting structure
                    • 2. Executive-level summarization
                      - Response workflow
                      • 1. Network-based investigation integration
                        • 2. Containment and eradication support
                          Topic 4: Network Protocol Analysis- Transport and session behavior
                          • 1. Session reconstruction techniques
                            • 2. TLS/SSL inspection concepts
                              - Application layer protocols
                              • 1. HTTP/HTTPS traffic analysis
                                • 2. DNS query and response forensics
                                  Topic 5: 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 6: Network Forensic Investigation- Evidence handling
                                          • 1. Chain of custody considerations
                                            • 2. Data integrity validation
                                              - Incident reconstruction
                                              • 1. Timeline creation from PCAP/logs
                                                • 2. Attribution and artifact correlation

                                                  GIAC Network Forensic Analyst (GNFA) Sample Questions:

                                                  Question #1

                                                  Which best practices should organizations follow when configuring log retention policies?
                                                  (Select two.)
                                                  Response:

                                                  • A. Retain logs based on regulatory compliance requirements
                                                  • B. Delete all logs after 30 days to save storage space
                                                  • C. Store all logs indefinitely
                                                  • D. Encrypt logs to prevent unauthorized access
                                                  Reveal Solution  Discussion  0

                                                  Correct Answer: A,D  🗳️

                                                  Question #2

                                                  Which transport layer protocol is best suited for applications requiring low latency but does not guarantee packet delivery?
                                                  Response:

                                                  • A. ICMP
                                                  • B. TCP
                                                  • C. UDP
                                                  • D. SCTP
                                                  Reveal Solution  Discussion  0

                                                  Correct Answer: C  🗳️

                                                  Question #3

                                                  An organization notices an increase in wireless network congestion and connectivity issues. What steps should be taken to identify potential sources of interference?
                                                  Response:

                                                  • A. Disable WPA2 encryption
                                                  • B. Conduct a site survey to identify interference sources
                                                  • C. Increase the power of the access points
                                                  • D. Implement VLAN segmentation
                                                  Reveal Solution  Discussion  0

                                                  Correct Answer: B  🗳️

                                                  Question #4

                                                  What is the primary purpose of ICMP (Internet Control Message Protocol)?
                                                  Response:

                                                  • A. Performing network diagnostics and reporting errors
                                                  • B. Routing data between networks
                                                  • C. Encrypting communication between endpoints
                                                  • D. Managing TCP handshakes
                                                  Reveal Solution  Discussion  0

                                                  Correct Answer: A  🗳️

                                                  Question #5

                                                  Which of the following techniques are used to obfuscate encoded data?
                                                  (Select two.)
                                                  Response:

                                                  • A. Base64 encoding
                                                  • B. SHA-256 hashing
                                                  • C. XOR encryption
                                                  • D. URL encoding
                                                  Reveal Solution  Discussion  0

                                                  Correct Answer: A,D  🗳️

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