GIAC Network Forensic Analyst (GNFA) : GNFA

  • Exam Code: GNFA
  • Exam Name: GIAC Network Forensic Analyst (GNFA)
  • Updated: Sep 06, 2026   Q&As: 97 Questions and Answers
  • Q & A: 97 Questions and Answers

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About GIAC Network Forensic Analyst (GNFA) : GNFA Exam

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GIAC GNFA Exam Syllabus Topics:
SectionObjectives
Topic 1: Encryption and Encoding Techniques- Common encoding methods and data obfuscation
- Attacks against encryption and encoding controls
- Encryption algorithms, usage, and implementation
Topic 2: Wireless Network Analysis- Capture, analysis, and interpretation of wireless traffic
- Threats, attacks, and forensic investigation methods
- Wireless protocols, operation, and security risks
Topic 3: Common Network Protocols- Security risks, vulnerabilities, and mitigation controls
- TCP, UDP, IP, HTTP, DNS, SMTP, FTP, and other core protocols
- Protocol behavior, characteristics, and normal operation
Topic 4: Network Architecture and Design- Design considerations for forensics and evidence collection
- Segmentation, filtering, and security architecture principles
- Network topologies, transmission technologies, and collection points
Topic 5: Open-Source Network Security Proxies- Log formats, data flow, and forensic value
- Benefits, limitations, and security weaknesses
- Architecture, deployment, and operational characteristics
Topic 6: Network Analysis Tools and Usage- Practical application in investigation and analysis
- Command-line and GUI-based forensic utilities
- Traffic capture and analysis tools (tcpdump, Wireshark, etc.)
Topic 7: NetFlow Analysis and Attack Visualization- Using flow data to identify anomalies, attacks, and lateral movement
- Visualization and analysis tools and techniques
- NetFlow, IPFIX, and flow data formats
Topic 8: Network Protocol Reverse Engineering- Extracting structure, behavior, and data from traffic
- Identifying malicious or non-standard communications
- Tools and methodologies for analyzing unknown or proprietary protocols
Topic 9: Security Event and Incident Logging- Log formats, standards, and protocol details
- Deployment, aggregation, and retention strategies
- Correlating logs to reconstruct events and activity
GIAC Network Forensic Analyst (GNFA) Sample Questions:

Question 1

Which of the following are characteristics of the TCP protocol?
(Select two.)
Response:

A. Used for real-time applications
B. Connection-oriented communication
C. Best-effort delivery
D. Reliable data transfer


Question 2

Which of the following encryption algorithms are considered secure for modern cryptographic use?
(Select two.)
Response:

A. Blowfish
B. AES-256
C. DES
D. RC4


Question 3

What is the primary purpose of NetFlow in network security analysis?
Response:

A. Capturing full packet data for forensic analysis
B. Encrypting network traffic to prevent data leaks
C. Monitoring and analyzing network traffic patterns
D. Blocking malicious IPs automatically


Question 4

Which of the following are key benefits of centralizing security event logs?
(Select two.)
Response:

A. Improved detection of correlated security events
B. Faster network speeds
C. Reduced need for manual log review
D. Immediate compliance with all security regulations


Question 5

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. TCP SYN Flood
B. ICMP Flood
C. DNS Spoofing
D. ARP Poisoning


Solutions:

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

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