Exam Name: GIAC Network Forensic Analyst (GNFA)
Certification Provider: GIAC
Corresponding Certification: Digital Forensics
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Updated: Sep 14, 2026
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GIAC GNFA Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Network Fundamentals for Forensics | - Network architecture and traffic flow
|
| Network Forensic Investigation | - Evidence handling
|
| Incident Response and Reporting | - Response workflow
|
| Packet Capture and Traffic Analysis | - Traffic inspection tools
|
| Network Protocol Analysis | - Application layer protocols
|
| Network Intrusion Detection and Analysis | - Malicious traffic identification
|
GIAC Network Forensic Analyst (GNFA) Sample Questions:
Which of the following is an indication of a custom or proprietary network protocol?
Response:
- A. Non-standard packet structures and headers
- B. Use of open-source encryption libraries
- C. Presence of cleartext credentials in packets
- D. Standard TCP and UDP port usage
Correct Answer: A 🗳️
Which of the following NetFlow-based anomalies could indicate a Distributed Denial-of-Service (DDoS) attack?
(Select two.)
Response:
- A. Unusual encrypted payload patterns
- B. High number of unique destination IPs from a single source
- C. High volume of traffic from a single source
- D. Large number of failed login attempts
Correct Answer: B,C 🗳️
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. Asymmetric encryption
- B. Encoding
- C. Symmetric encryption
- D. Hashing
Correct Answer: A 🗳️
What technique is used to analyze an unknown protocol by observing repeated patterns and structure in network traffic?
Response:
- A. SQL injection
- B. Statistical analysis
- C. Code injection
- D. Fuzzing
Correct Answer: B 🗳️
Which open-source tool is commonly used as a forward and reverse proxy for security analysis?
Response:
- A. Burp Suite
- B. Wireshark
- C. Nessus
- D. Snort
Correct Answer: A 🗳️
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