Exam Name: GIAC Network Forensic Analyst (GNFA)
Certification Provider: GIAC
Corresponding Certification: Digital Forensics
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GIAC GNFA Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| NetFlow Analysis and Attack Visualization | - Visualization and analysis tools and techniques - NetFlow, IPFIX, and flow data formats - Using flow data to identify anomalies, attacks, and lateral movement |
| Network Architecture and Design | - Segmentation, filtering, and security architecture principles - Network topologies, transmission technologies, and collection points - Design considerations for forensics and evidence collection |
| Common Network Protocols | - Security risks, vulnerabilities, and mitigation controls - Protocol behavior, characteristics, and normal operation - TCP, UDP, IP, HTTP, DNS, SMTP, FTP, and other core protocols |
| Open-Source Network Security Proxies | - Log formats, data flow, and forensic value - Architecture, deployment, and operational characteristics - Benefits, limitations, and security weaknesses |
| 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.) |
| Encryption and Encoding Techniques | - Common encoding methods and data obfuscation - Encryption algorithms, usage, and implementation - Attacks against encryption and encoding controls |
| Wireless Network Analysis | - Capture, analysis, and interpretation of wireless traffic - Wireless protocols, operation, and security risks - Threats, attacks, and forensic investigation methods |
| Security Event and Incident Logging | - Correlating logs to reconstruct events and activity - Log formats, standards, and protocol details - Deployment, aggregation, and retention strategies |
| 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 |
GIAC Network Forensic Analyst (GNFA) Sample Questions:
What is a key advantage of using a proxy-based firewall compared to a packet-filtering firewall?
Response:
- A. Proxy-based firewalls cannot block specific content types
- B. Packet-filtering firewalls work at the application layer
- C. Proxy-based firewalls inspect entire application-layer data
- D. Packet-filtering firewalls are more secure
Which of the following hashing algorithms is considered weak due to its vulnerability to collisions?
Response:
- A. RSA-2048
- B. MD5
- C. SHA-512
- D. AES-256
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
Which of the following are benefits of a software-defined network (SDN)?
(Select two.)
Response:
- A. Increased reliance on physical network devices
- B. Centralized control of network traffic
- C. Elimination of the need for firewalls
- D. Greater flexibility and automation
Which protocol operates at Layer 3 of the OSI model and is responsible for logical addressing?
Response:
- A. UDP
- B. ARP
- C. TCP
- D. IP
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