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GIAC GNFA Exam Syllabus Topics:

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

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GIAC Network Forensic Analyst (GNFA) Sample Questions (Q49-Q54):

NEW QUESTION # 49
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. Investigate the encoding scheme used in the traffic
C. Assume the traffic is normal and ignore it
D. Terminate all active network sessions

Answer: B

NEW QUESTION # 50
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 are more secure
C. Packet-filtering firewalls work at the application layer
D. Proxy-based firewalls inspect entire application-layer data

Answer: D

NEW QUESTION # 51
Which of the following is a benefit of using a transparent proxy?
Response:

A. It does not require client-side configuration
B. It eliminates the need for network monitoring
C. It blocks all traffic from unknown sources
D. It encrypts all internet traffic by default

Answer: A

NEW QUESTION # 52
Which of the following are characteristics of the TCP protocol?
(Select two.)
Response:

A. Best-effort delivery
B. Reliable data transfer
C. Connection-oriented communication
D. Used for real-time applications

Answer: B,C

NEW QUESTION # 53
You are analyzing network traffic and find a series of communications using an unknown protocol. The traffic appears structured, but there is no official documentation available. What should be your first step?
Response:

A. Search for open-source documentation
B. Attempt brute-force decryption
C. Block all traffic using the protocol immediately
D. Capture and inspect the packets using Wireshark

Answer: D

NEW QUESTION # 54
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