GIAC GNFA : GIAC Network Forensic Analyst (GNFA)

Exam Code: GNFA

Exam Name: GIAC Network Forensic Analyst (GNFA)

Updated: Jul 02, 2026

Q & A: 97 Questions and Answers

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GIAC Network Forensic Analyst (GNFA) Sample Questions:

1. A security analyst detects an application sending large volumes of encoded traffic to a remote server over an uncommon port. The analyst suspects data exfiltration. What should be done next?
Response:

A) Immediately block the port on the firewall
B) Terminate all active network sessions
C) Assume the traffic is normal and ignore it
D) Investigate the encoding scheme used in the traffic


2. What types of security events should organizations prioritize in log analysis?
(Select two.)
Response:

A) Failed login attempts
B) Routine system reboots
C) Large data transfers from internal to external networks
D) CPU utilization logs


3. Which best practices should organizations follow when configuring log retention policies?
(Select two.)
Response:

A) Delete all logs after 30 days to save storage space
B) Encrypt logs to prevent unauthorized access
C) Store all logs indefinitely
D) Retain logs based on regulatory compliance requirements


4. What are the benefits of using NetFlow for threat detection?
(Select two.)
Response:

A) Identifies large-scale data exfiltration
B) Helps detect command-and-control (C2) communications
C) Captures real-time keystroke logging
D) Provides detailed packet-level data


5. Which transport layer protocol is best suited for applications requiring low latency but does not guarantee packet delivery?
Response:

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


Solutions:

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

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