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GIAC GNFA : GIAC Network Forensic Analyst (GNFA)

Exam Code: GNFA

Exam Name: GIAC Network Forensic Analyst (GNFA)

Updated: Jun 22, 2026

Q & A: 97 Questions and Answers

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GIAC Network Forensic Analyst (GNFA) Sample Questions:

1. Which tools are useful for network protocol reverse engineering?
(Select two.)
Response:

A) IDA Pro
B) Kali Linux
C) Nessus
D) Wireshark


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

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


3. A network administrator is investigating slow network performance and suspects excessive broadcast traffic. The admin captures packets and sees that a large number of ARP requests are being sent. Which of the following attacks is most likely occurring?
Response:

A) ICMP Flood
B) DNS Spoofing
C) TCP SYN Flood
D) ARP Poisoning


4. What is the primary purpose of NetFlow in network security analysis?
Response:

A) Encrypting network traffic to prevent data leaks
B) Blocking malicious IPs automatically
C) Capturing full packet data for forensic analysis
D) Monitoring and analyzing network traffic patterns


5. What technique is used to analyze an unknown protocol by observing repeated patterns and structure in network traffic?
Response:

A) SQL injection
B) Code injection
C) Fuzzing
D) Statistical analysis


Solutions:

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

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