GIAC Network Forensic Analyst (GNFA) : GNFA

  • Exam Code: GNFA
  • Exam Name: GIAC Network Forensic Analyst (GNFA)
  • Updated: Sep 20, 2026
  • Q&As: 97 Questions and Answers

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GIAC GNFA Exam Syllabus Topics:

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

GIAC Network Forensic Analyst (GNFA) Sample Questions:

Question #1

Which open-source tools are commonly used for network security proxying?
(Select two.)
Response:

  • A. Privoxy
  • B. OpenVPN
  • C. Wireshark
  • D. Squid
Reveal Solution  Discussion  0

Correct Answer: A,D  🗳️

Question #2

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

  • A. Reduced need for manual log review
  • B. Improved detection of correlated security events
  • C. Faster network speeds
  • D. Immediate compliance with all security regulations
Reveal Solution  Discussion  0

Correct Answer: A,B  🗳️

Question #3

A network administrator notices that an internal web server is being accessed from multiple external sources in an unusual pattern. What security proxy feature would help in identifying and mitigating this attack?
Response:

  • A. Data compression
  • B. Application-layer filtering
  • C. Port forwarding
  • D. DNS caching
Reveal Solution  Discussion  0

Correct Answer: B  🗳️

Question #4

What is a key advantage of using a proxy-based firewall compared to a packet-filtering firewall?
Response:

  • A. Packet-filtering firewalls are more secure
  • B. Proxy-based firewalls inspect entire application-layer data
  • C. Proxy-based firewalls cannot block specific content types
  • D. Packet-filtering firewalls work at the application layer
Reveal Solution  Discussion  0

Correct Answer: B  🗳️

Question #5

What are the main functions of the Domain Name System (DNS)?
(Select two.)
Response:

  • A. Assigning MAC addresses to devices
  • B. Managing email servers
  • C. Distributing network traffic among multiple servers
  • D. Resolving domain names to IP addresses
Reveal Solution  Discussion  0

Correct Answer: C,D  🗳️

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