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Home  /  GIAC Certifications  /  GCIA
🔥 Trending Certification · 2025

GIAC Certified Intrusion Analyst (GCIA)

Validate your expertise in network traffic analysis and intrusion detection. GCIA-certified professionals demonstrate advanced skills in packet analysis, protocol identification, network forensics, and the use of intrusion detection systems to identify and respond to cyber threats. GCIA includes a CyberLive hands-on practical component, validating real-world analysis skills beyond theory alone.

Intrusion Detection Packet Analysis Network Forensics Protocol Analysis IDS/IPS Industry Recognised Career Defining
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Packet & Protocol AnalysisDeep packet inspection & decoding
Intrusion DetectionIDS signature & anomaly detection
Network Traffic ForensicsFlow data & PCAP investigation
Threat IdentificationAdversary TTPs in network traffic
106
Exam Questions
4 hrs
Duration
67%
Passing Score
GIAC
Certified
Why It's Trending

Network Intrusion Analysis Skills Drive Faster Threat Detection

With network traffic volumes exploding and attackers hiding in encrypted channels, intrusion analysts who can decode packets and identify threats in real time are more valuable than ever.

Trending
280x
Growth in Network Traffic Since 2015
Analysing modern network volumes requires deep expertise in protocol analysis, filtering, and anomaly detection.
13,500+
Open IDS & Network Analysis Roles
Intrusion analysts and network security engineers remain critically short-staffed across all sectors.
Trending
Hands-On
CyberLive + Theory Certification
GCIA is one of few GIAC certs with a CyberLive practical component — validating real-world analysis skills.
+30%
Salary Premium for GCIA Holders
Network intrusion analysts with GIAC credentials command strong salary premiums in SOC and network security roles.
Exam Overview

GCIA Exam Details

Language
English
Duration
4 Hours
Questions
106
Passing Score
67%
Format
Proctored Online + CyberLive (Hands-on)
Delivery
Web-based Exam
Course Content

Complete GCIA Curriculum

Click any module to expand and explore the topics covered in detail.

01
Network Traffic Analysis Fundamentals
5 Topics
TCP/IP protocol suite and packet structure review
Using Wireshark for traffic capture and analysis
Filtering and extracting data from packet captures
Network baseline establishment and anomaly identification
IPv4 and IPv6 header analysis for threat detection
02
Intrusion Detection Systems
5 Topics
IDS architecture: network-based and host-based systems
Snort and Suricata rule writing and tuning
Signature-based vs. anomaly-based detection
Alert triage and false positive reduction
IDS deployment strategies for enterprise networks
03
Protocol Analysis & Exploitation Detection
5 Topics
Application protocol analysis: HTTP, DNS, FTP, SMB
Detecting protocol anomalies and evasion techniques
Encrypted traffic analysis and TLS inspection
Detecting C2 communications in network traffic
Identifying lateral movement via network traffic patterns
04
Network Forensics
5 Topics
PCAP analysis for forensic investigation
NetFlow and IPFIX data for traffic reconstruction
Identifying data exfiltration in network traffic
Reconstructing attack timelines from network evidence
Correlating network and endpoint evidence
05
Advanced Threat Detection
5 Topics
Detecting scanning, enumeration, and reconnaissance
Identifying exploitation attempts in network traffic
Web attack detection: SQLi, XSS, and path traversal in packets
Detecting malware beaconing and DGA domains
Threat hunting in network traffic using hypothesis-driven analysis
Who Is This For

Designed for Network Security Professionals

GCIA is purpose-built for professionals who analyse network traffic, operate intrusion detection systems, and investigate threats in enterprise network environments.

Intrusion Analysts
Network Security Engineers
SOC Analysts
Incident Responders
Threat Hunters
Network Administrators
FAQs

Frequently Asked Questions

What is the GIAC Certified Intrusion Analyst (GCIA) certification?
GCIA validates advanced expertise in network traffic analysis and intrusion detection — covering packet analysis, protocol identification, IDS rule writing, network forensics, and the identification of adversary activity in network traffic.
What are the GCIA exam requirements?
The GCIA exam consists of 106 questions, is web-based and proctored, has a 4-hour time limit, and requires a minimum passing score of 67%. It includes a CyberLive practical component. Proctoring is available via ProctorU (remote) or PearsonVUE (onsite).
What is the CyberLive component of GCIA?
CyberLive is GIAC's hands-on practical exam component. GCIA candidates must complete live analysis tasks — such as analysing packet captures, writing IDS rules, or identifying threats — using real tools in a practical environment.
What tools does GCIA cover?
GCIA covers Wireshark, tcpdump, Snort, Suricata, NetFlow analysis tools, and various packet analysis frameworks — focusing on methodology and understanding rather than tool-specific workflows.
Who should pursue the GCIA certification?
GCIA is ideal for intrusion analysts, network security engineers, SOC analysts, incident responders, threat hunters, and network administrators who need deep expertise in identifying threats from network traffic.
How does GCIA relate to GCDA?
GCIA is network-centric (packets, protocols, IDS) while GCDA covers the broader detection landscape including log analysis, SIEM, endpoint, and cloud detection. GCIA goes deeper on network traffic analysis and intrusion detection systems.
Get Started

Master Network Intrusion Analysis with GCIA

Join Zetlan Technologies' GCIA programme and develop advanced skills in packet analysis, intrusion detection, network forensics, and threat identification. Earn your GIAC certification — including CyberLive practical validation.

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