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GIAC GNFA Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: Network Analysis Tools and Usage | - Command-line and GUI-based forensic utilities - Practical application in investigation and analysis - Traffic capture and analysis tools (tcpdump, Wireshark, etc.) |
| Topic 2: Security Event and Incident Logging | - Log formats, standards, and protocol details - Deployment, aggregation, and retention strategies - Correlating logs to reconstruct events and activity |
| Topic 3: Common Network Protocols | - Protocol behavior, characteristics, and normal operation - TCP, UDP, IP, HTTP, DNS, SMTP, FTP, and other core protocols - Security risks, vulnerabilities, and mitigation controls |
| Topic 4: Encryption and Encoding Techniques | - Common encoding methods and data obfuscation - Encryption algorithms, usage, and implementation - Attacks against encryption and encoding controls |
| Topic 5: Network Protocol Reverse Engineering | - Tools and methodologies for analyzing unknown or proprietary protocols - Extracting structure, behavior, and data from traffic - Identifying malicious or non-standard communications |
| Topic 6: NetFlow Analysis and Attack Visualization | - NetFlow, IPFIX, and flow data formats - Using flow data to identify anomalies, attacks, and lateral movement - Visualization and analysis tools and techniques |
| Topic 7: Open-Source Network Security Proxies | - Architecture, deployment, and operational characteristics - Log formats, data flow, and forensic value - Benefits, limitations, and security weaknesses |
| Topic 8: Wireless Network Analysis | - Capture, analysis, and interpretation of wireless traffic - Threats, attacks, and forensic investigation methods - Wireless protocols, operation, and security risks |
| Topic 9: Network Architecture and Design | - Segmentation, filtering, and security architecture principles - Network topologies, transmission technologies, and collection points - Design considerations for forensics and evidence collection |
GIAC Network Forensic Analyst (GNFA) Sample Questions:
Question 1
Which technologies are commonly used in network segmentation strategies?
(Select two.)
Response:
A. IPv6
B. VPN
C. MPLS
D. VLANs
Question 2
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. Assume the traffic is normal and ignore it
C. Investigate the encoding scheme used in the traffic
D. Terminate all active network sessions
Question 3
Which best practices should organizations follow when configuring log retention policies?
(Select two.)
Response:
A. Encrypt logs to prevent unauthorized access
B. Retain logs based on regulatory compliance requirements
C. Delete all logs after 30 days to save storage space
D. Store all logs indefinitely
Question 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 inspects logs for forensic investigations
D. It analyzes live network traffic to understand protocol behavior
Question 5
Which security measures help protect against unauthorized access to network architecture?
(Select two.)
Response:
A. Deploying intrusion detection systems (IDS)
B. Implementing least privilege access
C. Using default admin credentials
D. Allowing open access to all internal systems
Solutions:
| Question 1 Answer: C,D | Question 2 Answer: C | Question 3 Answer: A,B | Question 4 Answer: D | Question 5 Answer: A,B |
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