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GIAC GNFA Exam Syllabus Topics:

SectionObjectives
Topic 1: Wireless and Encrypted Traffic Analysis- Advanced Traffic Analysis
  • 1. Encrypted traffic inspection
  • 2. TLS and SSL investigations
  • 3. Wireless protocol analysis
Topic 2: Network Forensics Fundamentals- Network Forensic Concepts
  • 1. Packet analysis fundamentals
  • 2. Traffic reconstruction
  • 3. Network evidence acquisition
Topic 3: Log and Metadata Analysis- System and Network Logs
  • 1. Proxy and web logs
  • 2. NetFlow and metadata analysis
  • 3. Firewall log analysis
Topic 4: Incident Response and Investigation- Investigation Procedures
  • 1. Evidence handling
  • 2. Incident scoping
  • 3. Reporting and documentation
Topic 5: Intrusion Detection and Threat Hunting- Threat Detection Techniques
  • 1. Threat hunting methodologies
  • 2. Network intrusion investigations
  • 3. Indicators of compromise
  • 4. Anomalous traffic detection
Topic 6: Network Protocol Analysis- Protocol Identification and Interpretation
  • 1. DNS traffic analysis
  • 2. HTTP and HTTPS analysis
  • 3. Email protocol analysis
  • 4. TCP/IP analysis

GIAC Network Forensic Analyst (GNFA) Sample Questions:

Question 1

What is the primary purpose of cryptographic salt in password hashing?
Response:

A. To shorten the length of the hash for storage efficiency
B. To replace the original password with a hash value
C. To add randomness to password hashes, preventing precomputed attacks
D. To encrypt passwords using asymmetric encryption


Question 2

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

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


Question 3

An attacker intercepts a legitimate communication session and inserts malicious commands while appearing as a trusted participant. Which protocol is most vulnerable to this attack due to its lack of encryption?
Response:

A. SFTP
B. FTP
C. HTTPS
D. SSH


Question 4

Which protocol is commonly used for network device management and monitoring?
Response:

A. FTP
B. SNMP
C. DHCP
D. HTTP


Question 5

Which of the following is an indication of a custom or proprietary network protocol?
Response:

A. Non-standard packet structures and headers
B. Standard TCP and UDP port usage
C. Use of open-source encryption libraries
D. Presence of cleartext credentials in packets


Solutions:

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

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