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GIAC GNFA Exam Syllabus Topics:

SectionObjectives
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
          Incident Response and Reporting- Reporting and documentation
          • 1. Executive-level summarization
            • 2. Technical reporting structure
              - Response workflow
              • 1. Containment and eradication support
                • 2. Network-based investigation integration
                  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
                          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
                                  Network Forensic Investigation- Evidence handling
                                  • 1. Chain of custody considerations
                                    • 2. Data integrity validation
                                      - Incident reconstruction
                                      • 1. Attribution and artifact correlation
                                        • 2. Timeline creation from PCAP/logs
                                          Packet Capture and Traffic Analysis- Packet acquisition techniques
                                          • 1. tcpdump usage and filtering
                                            • 2. PCAP collection best practices
                                              - Traffic inspection tools
                                              • 1. Wireshark analysis workflows
                                                • 2. Protocol decoding and inspection

                                                  GIAC Network Forensic Analyst (GNFA) Sample Questions:

                                                  Question 1

                                                  Which of the following are features of a forward proxy?
                                                  (Select two.)
                                                  Response:

                                                  A. Caches frequently accessed web content
                                                  B. Filters outgoing client requests
                                                  C. Protects internal servers from direct exposure
                                                  D. Functions only at the transport layer


                                                  Question 2

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

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


                                                  Question 3

                                                  What is the primary purpose of cryptographic salt in password hashing?
                                                  Response:

                                                  A. To encrypt passwords using asymmetric encryption
                                                  B. To replace the original password with a hash value
                                                  C. To add randomness to password hashes, preventing precomputed attacks
                                                  D. To shorten the length of the hash for storage efficiency


                                                  Question 4

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

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


                                                  Question 5

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

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


                                                  Solutions:

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

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