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GIAC GNFA Exam Syllabus Topics:

Section	Objectives
Network Fundamentals for Forensics	- Network architecture and traffic flow 1. Network segmentation and visibility 2. Client-server communication patterns - TCP/IP protocol suite understanding 1. IP addressing and subnetting 2. TCP vs UDP behavior analysis
Network Intrusion Detection and Analysis	- Malicious traffic identification 1. Lateral movement indicators 2. Command and control detection patterns - IDS/IPS interpretation 1. Signature vs anomaly detection 2. Alert triage and validation
Network Protocol Analysis	- Application layer protocols 1. HTTP/HTTPS traffic analysis 2. DNS query and response forensics - Transport and session behavior 1. Session reconstruction techniques 2. TLS/SSL inspection concepts
Packet Capture and Traffic Analysis	- Packet acquisition techniques 1. tcpdump usage and filtering 2. PCAP collection best practices - Traffic inspection tools 1. Wireshark analysis workflows 2. Protocol decoding and inspection
Network Forensic Investigation	- Evidence handling 1. Chain of custody considerations 2. Data integrity validation - Incident reconstruction 1. Timeline creation from PCAP/logs 2. Attribution and artifact correlation
Incident Response and Reporting	- Response workflow 1. Containment and eradication support 2. Network-based investigation integration - Reporting and documentation 1. Technical reporting structure 2. Executive-level summarization

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GIAC Network Forensic Analyst (GNFA) Sample Questions (Q34-Q39):

NEW QUESTION # 34
Which of the following NetFlow-based anomalies could indicate a Distributed Denial-of-Service (DDoS) attack?
(Select two.)
Response:

A. High volume of traffic from a single source
B. Large number of failed login attempts
C. Unusual encrypted payload patterns
D. High number of unique destination IPs from a single source

Answer: A,D

NEW QUESTION # 35
What are the benefits of using NetFlow for threat detection?
(Select two.)
Response:

A. Identifies large-scale data exfiltration
B. Captures real-time keystroke logging
C. Provides detailed packet-level data
D. Helps detect command-and-control (C2) communications

Answer: A,D

NEW QUESTION # 36
What is the primary purpose of NetFlow in network security analysis?
Response:

A. Capturing full packet data for forensic analysis
B. Blocking malicious IPs automatically
C. Encrypting network traffic to prevent data leaks
D. Monitoring and analyzing network traffic patterns

Answer: D

NEW QUESTION # 37
What is the main advantage of a segmented network architecture?
Response:

A. Reduced performance due to additional firewalls
B. Increased complexity in routing
C. Elimination of network monitoring needs
D. Improved security by limiting lateral movement

Answer: D

NEW QUESTION # 38
Which actions can be taken after detecting malicious activity using NetFlow?
(Select two.)
Response:

A. Capture full packet data for forensic analysis
B. Block malicious IP addresses at the firewall
C. Modify encryption keys dynamically
D. Decrypt all traffic for deeper analysis

Answer: A,B

NEW QUESTION # 39
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