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  • Exam Code: GCIA
  • Exam Name: GIAC Certified Intrusion Analyst
  • No. of Questions: 508 Questions and Answers
  • Updated: Nov 07, 2026

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Walking into the GCIA exam without knowing the question style is a risk you do not need to take. Actual4Labs's test engines simulate the exam environment, so by exam day in 2026 the 508 practice questions for GIAC Certified Intrusion Analyst will feel like familiar ground.

GIAC GCIA Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: Traffic Analysis & Protocol Fundamentals25%- Packet fragmentation, TTL, checksums and anomalies
- Protocol state machines and normal behavior
- IP, IPv6, TCP, UDP, ICMP header analysis
- TCP/IP model and link layer operations
Topic 2: Advanced Intrusion Detection15%- Detecting APTs, lateral movement and beaconing
- Covert channels and encrypted traffic analysis
- Threat intelligence mapping and MITRE ATT&CK
Topic 3: Traffic Analysis Tools & Techniques15%- Flow analysis with SiLK and NetFlow/IPFIX
- Wireshark, tcpdump, filter creation and packet inspection
- Full packet capture and log correlation
Topic 4: Network Forensics & Incident Analysis5%- Reconstructing incidents from captures and logs
- Identifying attack vectors and compromise indicators
Topic 5: Application Protocol Analysis20%- HTTP, DNS, SMTP, FTP and SSH traffic analysis
- Anomaly detection in application-layer communications
- Data exfiltration and tunneling indicators
Topic 6: IDS/IPS Concepts & Signatures20%- IDS/IPS architecture, deployment and tuning
- Snort and Zeek rule writing and optimization
- Detection logic, evasion and correlation

Common Questions About the GIAC GCIA Exam, Answered

The GCIA exam, officially titled GIAC Certified Intrusion Analyst, is the qualifying exam for the GIAC Certified Intrusion Analyst certification, which sits at the Practitioner / Intermediate to Advanced level. Earning it shows employers that you have the skills the credential stands for, and it is a solid step forward on a GIAC career path. It also connects to GCIH, GCFA, GCWN, GCDA, so the effort you put in now keeps paying off as you advance.

The GCIA exam gives you 106 questions to complete within 240 minutes. Do the math before exam day: divide the total time by the question count to set a steady per-question pace, and flag any item that stalls you so you can return to it after securing the easier points. The most reliable way to build that rhythm is a full timed practice test under the same limit, which is exactly what Actual4Labs's test engines are designed for.

The passing score for GIAC Certified Intrusion Analyst is 67%, and the official registration fee is $999 USD. Keep in mind that a retake means paying that fee again in full, which makes an honest self-check worthwhile: before you book, sit a timed practice test and make sure you are consistently scoring above the passing line with some margin to spare.

According to the official requirements: No formal prerequisites; completion of SANS SEC503 recommended; basic TCP/IP and security knowledge advised. Eligibility rules do change from time to time, so confirm the current details on the official exam page before you register.

Registration for the GCIA exam is handled through the official channels below:

The exam is delivered in the following format: Web-based proctored exam: remote via ProctorU or on-site at Pearson VUE centers. Pick a date that leaves room for at least one full timed practice test beforehand.

GIAC recommends the following official training options for candidates preparing for GIAC Certified Intrusion Analyst:

Courses build the foundation, but they work best alongside question practice. That is where Actual4Labs comes in: the 508 practice questions in our GCIA package let you rehearse the exam format at your own pace and see exactly where you stand.

Yes — Actual4Labs offers a free PDF demo of the GIAC Certified Intrusion Analyst material, so you can review the question style and answer quality before you spend anything. After purchase, you also receive 365 days of free updates, and if your product expires you can extend the update service at a 50% discount from your member zone.

If you take the corresponding exam within 60 days of your purchase and do not pass, you are covered by the 100% Money Back Guarantee under clear conditions. To claim a full refund, submit a scan of your exam enrollment slip and your official Score Report PDF within two days of the exam; requests are processed within seven days. Note that sitting the exam within three days of purchase is not eligible, purchases that were never followed by an exam sitting do not qualify, free materials and expired orders are excluded, and the candidate name must match the payer name. Prefer an exchange instead? You can swap your product for two free exam packages of equal value and keep your update service. Delivery is immediate: your GCIA material is ready for instant download and is also emailed to you within one minute of payment — contact customer service if nothing arrives within two hours. There is no limit on the number of computers you can install it on.

The current GIAC Certified Intrusion Analyst syllabus is organized into 6 exam domains. The first three are:

  • Traffic Analysis Tools & Techniques (15%)
  • Network Forensics & Incident Analysis (5%)
  • Advanced Intrusion Detection (15%)

For the full domain and subtopic breakdown, see the Exam Topics section above — that is the outline your Actual4Labs practice questions are mapped to.

GIAC Certified Intrusion Analyst Sample Questions:

You are using a Windows-based sniffer named ASniffer to record the data traffic of a network. You have extracted the following IP Header information of a randomly chosen packet from the sniffer's log:
45 00 00 28 00 00 40 00 29 06 43 CB D2 D3 82 5A 3B 5E AA 72
Which of the following TTL decimal values and protocols are being carried by the IP Header of this packet?

  • A. 41, UDP
  • B. 16, ICMP
  • C. 16, UDP
  • D. 41, TCP
Reveal Solution  Discussion  0

Correct Answer: D  🗳️

Which of the following protocols does IPsec use to perform various security functions in the network?
Each correct answer represents a complete solution. Choose all that apply.

  • A. Skinny Client Control Protocol
  • B. Encapsulating Security Payload
  • C. Authentication Header
  • D. Internet Key Exchange
Reveal Solution  Discussion  0

Correct Answer: B,C,D  🗳️

Adam works as a professional Computer Hacking Forensic Investigator. He wants to investigate a suspicious email that is sent using a Microsoft Exchange server. Which of the following files will he review to accomplish the task?
Each correct answer represents a part of the solution. Choose all that apply.

  • A. cookie files
  • B. Checkpoint files
  • C. EDB and STM database files
  • D. Temporary files
Reveal Solution  Discussion  0

Correct Answer: B,C,D  🗳️

Which of the following information must the fragments carry for the destination host to reassemble them back to the original unfragmented state?
Each correct answer represents a complete solution. Choose all that apply.

  • A. IP address
  • B. Offset field
  • C. IP identification number
  • D. MAC address
  • E. Length of the data
  • F. MF flag
Reveal Solution  Discussion  0

Correct Answer: B,C,E,F  🗳️

Mark works as a Network Security Administrator for BlueWells Inc. The company has a Windowsbased network. Mark is giving a presentation on Network security threats to the newly recruited employees of the company. His presentation is about the External threats that the company recently faced in the past. Which of the following statements are true about external threats?
Each correct answer represents a complete solution. Choose three.

  • A. These are the threats that originate from outside an organization in which the attacker attempts to gain unauthorized access.
  • B. These are the threats intended to flood a network with large volumes of access requests.
  • C. These threats can be countered by implementing security controls on the perimeters of the network, such as firewalls, which limit user access to the Internet.
  • D. These are the threats that originate from within the organization.
Reveal Solution  Discussion  0

Correct Answer: A,B,C  🗳️

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