GIAC Network Forensic Analyst (GNFA) : GNFA Exam Questions

  • Exam Code: GNFA
  • Exam Name: GIAC Network Forensic Analyst (GNFA)
  • Updated: Jun 17, 2026
  • Q&As: 97 Questions and Answers

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GIAC Network Forensic Analyst (GNFA) Sample Questions:

1. What is the primary goal of network protocol reverse engineering?
Response:

A) To analyze and understand undocumented or proprietary protocols
B) To design new network protocols
C) To replace network firewalls with better security
D) To encrypt network traffic for security purposes


2. Which of the following protocols operate at the transport layer of the OSI model?
(Select two.)
Response:

A) HTTP
B) TCP
C) ICMP
D) UDP


3. What methods are used to identify the structure of an unknown network protocol?
(Select two.)
Response:

A) Packet inspection
B) Watching video tutorials
C) Static code analysis
D) Reverse engineering binaries


4. Which of the following best describes an SIEM (Security Information and Event Management) system?
Response:

A) A device that encrypts all logs for security purposes
B) A tool that blocks malicious network traffic
C) A system that collects, normalizes, and analyzes security logs
D) A firewall rule enforcement mechanism


5. A security analyst is reviewing NetFlow data and notices a sudden increase in outbound connections to an unfamiliar IP address. The majority of the connections originate from a single internal workstation. What is the most likely cause?
Response:

A) A user downloading a large file
B) A botnet infection exfiltrating data
C) An error in NetFlow collection
D) Normal traffic fluctuation


Solutions:

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

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