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GIAC Network Forensic Analyst (GNFA) : GNFA

GNFA

Exam Code: GNFA

Exam Name: GIAC Network Forensic Analyst (GNFA)

Updated: Oct 20, 2026

Q & A: 97 Questions and Answers

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About GIAC Network Forensic Analyst (GNFA) certification

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GIAC GNFA Exam Syllabus Topics:

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

GIAC Network Forensic Analyst (GNFA) Sample Questions:

Question #1
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. Ignore the event unless a successful login occurs
B. Block the IP address immediately
C. Investigate the source IP and check for additional related logs
D. Delete the logs to free up storage space


Question #2
Which security measures help protect against unauthorized access to network architecture?
(Select two.)
Response:

A. Using default admin credentials
B. Implementing least privilege access
C. Deploying intrusion detection systems (IDS)
D. Allowing open access to all internal systems


Question #3
Which log sources are commonly used for detecting insider threats?
(Select two.)
Response:

A. Email logs
B. IDS/IPS logs
C. DNS logs
D. File access logs


Question #4
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 #5
Which of the following hashing algorithms belong to the SHA-2 family?
(Select two.)
Response:

A. SHA-1
B. SHA-512
C. SHA-256
D. MD5


Solutions:

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

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