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GIAC GNFA Exam Syllabus Topics:

GIAC Network Forensic Analyst (GNFA) Sample Questions:

Question 1

Which actions can be taken after detecting malicious activity using NetFlow?
(Select two.)
Response:

A. Modify encryption keys dynamically
B. Block malicious IP addresses at the firewall
C. Decrypt all traffic for deeper analysis
D. Capture full packet data for forensic analysis

Question 2

What is the primary purpose of log normalization in security event logging?
Response:

A. To store raw logs in different formats
B. To convert log entries into a consistent format for analysis
C. To encrypt all log data before analysis
D. To delete unnecessary logs for storage optimization

Question 3

A company is experiencing a data breach and suspects an insider threat. Which logs would be most useful in identifying the responsible party?
Response:

A. Firewall logs
B. DNS query logs
C. File access and authentication logs
D. Web server logs

Question 4

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

Question 5

An organization suspects that an attacker is using a tunneling technique to evade detection. The analyst checks NetFlow records and sees a high number of outbound DNS queries with unusually large payloads. What type of attack is likely occurring?
Response:

A. Ransomware execution
B. DNS Exfiltration
C. DDoS attack
D. Man-in-the-Middle attack

Solutions: