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GIAC GNFA Exam Syllabus Topics:

Section	Objectives
Topic 1: Incident Response and Reporting	- Response workflow 1. Network-based investigation integration 2. Containment and eradication support - Reporting and documentation 1. Executive-level summarization 2. Technical reporting structure
Topic 2: 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. IP addressing and subnetting 2. TCP vs UDP behavior analysis
Topic 3: Network Protocol Analysis	- Transport and session behavior 1. TLS/SSL inspection concepts 2. Session reconstruction techniques - Application layer protocols 1. HTTP/HTTPS traffic analysis 2. DNS query and response forensics
Topic 4: 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
Topic 5: Packet Capture and Traffic Analysis	- Traffic inspection tools 1. Wireshark analysis workflows 2. Protocol decoding and inspection - Packet acquisition techniques 1. PCAP collection best practices 2. tcpdump usage and filtering
Topic 6: Network Intrusion Detection and Analysis	- Malicious traffic identification 1. Lateral movement indicators 2. Command and control detection patterns - IDS/IPS interpretation 1. Alert triage and validation 2. Signature vs anomaly detection

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GIAC Network Forensic Analyst (GNFA) Sample Questions (Q71-Q76):

NEW QUESTION # 71
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. Terminate all active network sessions
B. Immediately block the port on the firewall
C. Investigate the encoding scheme used in the traffic
D. Assume the traffic is normal and ignore it

Answer: C

NEW QUESTION # 72
Which of the following are characteristics of the TCP protocol?
(Select two.)
Response:

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

Answer: A,D

NEW QUESTION # 73
What are the main functions of the Domain Name System (DNS)?
(Select two.)
Response:

A. Managing email servers
B. Assigning MAC addresses to devices
C. Distributing network traffic among multiple servers
D. Resolving domain names to IP addresses

Answer: C,D

NEW QUESTION # 74
Which of the following log sources would be most useful for detecting brute-force login attempts?
Response:

A. Network firewall logs
B. Web server access logs
C. Authentication logs
D. DNS query logs

Answer: C

NEW QUESTION # 75
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. Block all traffic using the protocol immediately
B. Search for open-source documentation
C. Attempt brute-force decryption
D. Capture and inspect the packets using Wireshark

Answer: D

NEW QUESTION # 76
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