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GIAC Network Forensic Analyst (GNFA) Sample Questions:

1. Which of the following techniques are used to obfuscate encoded data?
(Select two.)
Response:

A) XOR encryption
B) URL encoding
C) Base64 encoding
D) SHA-256 hashing

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

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

3. Which field in a NetFlow record can help determine if lateral movement is occurring within a network?
Response:

A) Destination IP Address and Source and Destination Port
B) Source and Destination Port
C) Protocol Type
D) Destination IP Address

4. What is the role of dynamic analysis in network protocol reverse engineering?
Response:

A) It involves executing malware to observe its behavior
B) It uses brute force attacks to identify weaknesses
C) It analyzes live network traffic to understand protocol behavior
D) It inspects logs for forensic investigations

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

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

Solutions: