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GIAC GNFA

GNFA

Exam Code: GNFA

Exam Name: GIAC Network Forensic Analyst (GNFA)

Updated: Sep 20, 2026

Q&A Number: 97 Q&As

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GIAC GNFA Exam Syllabus Topics:

SectionObjectives
Incident Response and Investigation- Investigation Procedures
  • 1. Incident scoping
  • 2. Reporting and documentation
  • 3. Evidence handling
Wireless and Encrypted Traffic Analysis- Advanced Traffic Analysis
  • 1. TLS and SSL investigations
  • 2. Encrypted traffic inspection
  • 3. Wireless protocol analysis
Log and Metadata Analysis- System and Network Logs
  • 1. Firewall log analysis
  • 2. Proxy and web logs
  • 3. NetFlow and metadata analysis
Intrusion Detection and Threat Hunting- Threat Detection Techniques
  • 1. Indicators of compromise
  • 2. Threat hunting methodologies
  • 3. Anomalous traffic detection
  • 4. Network intrusion investigations
Network Protocol Analysis- Protocol Identification and Interpretation
  • 1. HTTP and HTTPS analysis
  • 2. Email protocol analysis
  • 3. TCP/IP analysis
  • 4. DNS traffic analysis
Network Forensics Fundamentals- Network Forensic Concepts
  • 1. Network evidence acquisition
  • 2. Packet analysis fundamentals
  • 3. Traffic reconstruction

GIAC Network Forensic Analyst (GNFA) Sample Questions:

Question #1
What is the primary purpose of ICMP (Internet Control Message Protocol)?
Response:

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


Question #2
Which open-source tool is commonly used as a forward and reverse proxy for security analysis?
Response:

A. Nessus
B. Burp Suite
C. Wireshark
D. Snort


Question #3
Which of the following is a benefit of using a transparent proxy?
Response:

A. It does not require client-side configuration
B. It eliminates the need for network monitoring
C. It encrypts all internet traffic by default
D. It blocks all traffic from unknown sources


Question #4
An organization wants to implement a secure communication channel between two remote offices. The requirement is to ensure data confidentiality and integrity while being able to decrypt messages when needed. Which of the following cryptographic methods should they use?
Response:

A. Symmetric encryption
B. Asymmetric encryption
C. Encoding
D. Hashing


Question #5
A security analyst observes multiple failed login attempts from the same IP address within a short time. What is the most appropriate action to take?
Response:

A. Block the IP address immediately
B. Investigate the source IP and check for additional related logs
C. Delete the logs to free up storage space
D. Ignore the event unless a successful login occurs


Solutions:

Question #1
Correct Answer: A
Question #2
Correct Answer: B
Question #3
Correct Answer: A
Question #4
Correct Answer: B
Question #5
Correct Answer: B

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