• Exam Code: GNFA
  • Exam Name: GIAC Network Forensic Analyst (GNFA)
  • Certification Provider: GIAC
  • Corresponding Certification:Digital Forensics
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GNFA
  • Exam Code: GNFA
  • Exam Name: GIAC Network Forensic Analyst (GNFA)
  • Updated: Sep 05, 2026
  • No. of Questions: 97 Questions and Answers
  • Download Limit: Unlimited

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GIAC GNFA Exam Syllabus Topics:

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

GIAC Network Forensic Analyst (GNFA) Sample Questions:

Question 1

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

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


Question 2

Which security measures can help protect against deauthentication attacks?
(Select two.)
Response:

A. Disabling SSID broadcasting
B. Enabling Management Frame Protection (MFP)
C. Implementing WPA3
D. Using MAC address filtering


Question 3

Which actions can be taken after detecting malicious activity using NetFlow?
(Select two.)
Response:

A. Modify encryption keys dynamically
B. Decrypt all traffic for deeper analysis
C. Block malicious IP addresses at the firewall
D. Capture full packet data for forensic analysis


Question 4

A company is experiencing a data breach and suspects an insider threat. Which logs would be most useful in identifying the responsible party?
Response:

A. File access and authentication logs
B. DNS query logs
C. Web server logs
D. Firewall logs


Question 5

Which protocol is commonly used for network device management and monitoring?
Response:

A. SNMP
B. DHCP
C. FTP
D. HTTP


Solutions:

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

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