507 practice questions for GIAC Certified Intrusion Analyst (GCIA), with full explanations.
Every question comes with the correct answer and a clear explanation. Mapped to the current GCIA exam objectives.
- 507 questions mapped to the GCIA exam objectives
- Answers and explanations for every question, including the wrong options
- A questions-only PDF for timed practice runs
- Instant delivery by email the moment you check out
- Free monthly updates for as long as the exam is live
- Pass or your money back
The GCIA costs US$999 per attempt. This pack is US$39, paid once.
Try 10 questions free before you buy.
Last updated September 2026 · 507 questions
What makes the GCIA hard
The GCIA goes deeper on network traffic than most security professionals have ever had to go. It is 106 questions in four hours, open book, with a 67% pass mark.
This is not about recognising attack patterns. It is about understanding protocol behaviour at the packet level: TCP/IP internals, IDS signature development, application-layer protocol analysis, network forensics, and detecting attackers who are actively trying to evade defences. Most candidates who struggle have not gone deep enough on the technical side.
This pack has 507 practice questions for the GCIA, covering that much ground because the exam does, so it is a way to find the gaps before GIAC does.
About the exam
The GCIA validates hands-on skill in monitoring and analysing network traffic to detect and respond to intrusions. It covers the full spectrum from low-level packet analysis to IDS tuning and network forensics, making it one of the most technically demanding network defence certifications available. It is aligned to SANS SEC503.
Exam topics
- TCP/IP and protocol analysis: deep understanding of network protocols and packet behaviour
- Traffic analysis: capturing, filtering, and interpreting network traffic
- Intrusion detection: configuring and tuning IDS/IPS systems
- Signature development: writing and refining detection signatures
- Network forensics: reconstructing events from packet captures
- Application protocol analysis: HTTP, DNS, SMTP, and other application-layer protocols
- Evasion techniques: detecting attackers attempting to bypass network defences
106 questions, 4 hours, passing score 67%, open book, valid 4 years, maps to DoD 8140.
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