GIAC : GNFA Questions & Answers
Last Updated: Sep 19, 2026
No. of Questions: 97 Questions & Answers with Testing Engine
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GIAC GNFA Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Network Architecture and Design | - Design considerations for forensics and evidence collection - Segmentation, filtering, and security architecture principles - Network topologies, transmission technologies, and collection points |
| Open-Source Network Security Proxies | - Architecture, deployment, and operational characteristics - Benefits, limitations, and security weaknesses - Log formats, data flow, and forensic value |
| Common Network Protocols | - TCP, UDP, IP, HTTP, DNS, SMTP, FTP, and other core protocols - Protocol behavior, characteristics, and normal operation - Security risks, vulnerabilities, and mitigation controls |
| NetFlow Analysis and Attack Visualization | - Using flow data to identify anomalies, attacks, and lateral movement - Visualization and analysis tools and techniques - NetFlow, IPFIX, and flow data formats |
| Network Protocol Reverse Engineering | - Tools and methodologies for analyzing unknown or proprietary protocols - Identifying malicious or non-standard communications - Extracting structure, behavior, and data from traffic |
| 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 - Encryption algorithms, usage, and implementation - Attacks against encryption and encoding controls |
| Security Event and Incident Logging | - Log formats, standards, and protocol details - Correlating logs to reconstruct events and activity - Deployment, aggregation, and retention strategies |
| 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.) |
GIAC Network Forensic Analyst (GNFA) Sample Questions:
Which of the following protocols provides secure file transfers by encrypting data during transmission?
Response:
- A. Telnet
- B. FTP
- C. SFTP
- D. HTTP
Correct Answer: C 🗳️
What is the primary purpose of NetFlow in network security analysis?
Response:
- A. Encrypting network traffic to prevent data leaks
- B. Capturing full packet data for forensic analysis
- C. Blocking malicious IPs automatically
- D. Monitoring and analyzing network traffic patterns
Correct Answer: D 🗳️
Which open-source tool is commonly used as a forward and reverse proxy for security analysis?
Response:
- A. Snort
- B. Wireshark
- C. Burp Suite
- D. Nessus
Correct Answer: C 🗳️
A company wants to prevent employees from accessing malicious websites while browsing the internet. Which type of proxy would best meet this requirement?
Response:
- A. Network intrusion detection system
- B. Transparent forward proxy
- C. Load balancer
- D. Reverse proxy
Correct Answer: B 🗳️
Which of the following network protocols is commonly used for email transmission over the internet?
Response:
- A. SNMP
- B. FTP
- C. SMTP
- D. HTTP
Correct Answer: C 🗳️
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