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GIAC GNFA Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Network Protocol Reverse Engineering | - Identifying malicious or non-standard communications - Tools and methodologies for analyzing unknown or proprietary protocols - Extracting structure, behavior, and data from traffic |
| Network Architecture and Design | - Network topologies, transmission technologies, and collection points - Design considerations for forensics and evidence collection - Segmentation, filtering, and security architecture principles |
| Wireless Network Analysis | - Threats, attacks, and forensic investigation methods - Wireless protocols, operation, and security risks - Capture, analysis, and interpretation of wireless traffic |
| Encryption and Encoding Techniques | - Common encoding methods and data obfuscation - Attacks against encryption and encoding controls - Encryption algorithms, usage, and implementation |
| Open-Source Network Security Proxies | - Architecture, deployment, and operational characteristics - Benefits, limitations, and security weaknesses - Log formats, data flow, and forensic value |
| Network Analysis Tools and Usage | - Traffic capture and analysis tools (tcpdump, Wireshark, etc.) - Command-line and GUI-based forensic utilities - Practical application in investigation and analysis |
| Security Event and Incident Logging | - Correlating logs to reconstruct events and activity - Deployment, aggregation, and retention strategies - Log formats, standards, and protocol details |
| Common Network Protocols | - Protocol behavior, characteristics, and normal operation - Security risks, vulnerabilities, and mitigation controls - TCP, UDP, IP, HTTP, DNS, SMTP, FTP, and other core protocols |
| NetFlow Analysis and Attack Visualization | - Using flow data to identify anomalies, attacks, and lateral movement - NetFlow, IPFIX, and flow data formats - Visualization and analysis tools and techniques |
GIAC Network Forensic Analyst (GNFA) Sample Questions:
Question 1
Which open-source tools are commonly used for network security proxying?
(Select two.)
Response:
A. Wireshark
B. OpenVPN
C. Squid
D. Privoxy
Question 2
What methods are used to identify the structure of an unknown network protocol?
(Select two.)
Response:
A. Packet inspection
B. Static code analysis
C. Watching video tutorials
D. Reverse engineering binaries
Question 3
Which of the following are characteristics of the TCP protocol?
(Select two.)
Response:
A. Used for real-time applications
B. Best-effort delivery
C. Connection-oriented communication
D. Reliable data transfer
Question 4
An organization notices an increase in wireless network congestion and connectivity issues. What steps should be taken to identify potential sources of interference?
Response:
A. Conduct a site survey to identify interference sources
B. Implement VLAN segmentation
C. Disable WPA2 encryption
D. Increase the power of the access points
Question 5
A network administrator notices that an internal web server is being accessed from multiple external sources in an unusual pattern. What security proxy feature would help in identifying and mitigating this attack?
Response:
A. DNS caching
B. Application-layer filtering
C. Port forwarding
D. Data compression
Solutions:
| Question 1 Answer: C,D | Question 2 Answer: A,D | Question 3 Answer: C,D | Question 4 Answer: A | Question 5 Answer: B |
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