Quick Answer
The answer is VPC Flow Logs, because they capture IP traffic metadata for all network interfaces in a VPC, enabling you to analyze network traffic for data exfiltration by inspecting source and destination IPs, ports, and protocols in near real-time. When an EC2 instance is compromised, unusual outbound traffic patterns—such as sustained connections to an unknown external IP or data transfers at odd hours—can be detected by streaming these logs to Amazon Athena or CloudWatch Logs Insights for custom alerting. On the AWS Certified Security Specialty SCS-C02 exam, this question tests your ability to distinguish between services that provide raw network telemetry versus those that offer higher-level threat detection; a common trap is choosing GuardDuty, which uses VPC Flow Logs as a data source but does not give you direct flow log analysis. Remember: if you need to see the actual traffic metadata yourself, reach for VPC Flow Logs. Memory tip: “Flow for the raw flow” — VPC Flow Logs give you the raw network flow data to analyze.
This SCS-C02 practice question tests your understanding of threat detection and incident response. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
During a security incident, a security engineer suspects that an EC2 instance has been compromised and is exfiltrating data to an external IP address. Which AWS service can provide real-time network traffic analysis and alert on unusual outbound traffic patterns?
Amazon Inspector
Why wrong: Inspector is for vulnerability scanning, not network monitoring.
AWS CloudTrail
Why wrong: CloudTrail logs API calls, not network traffic.
Amazon GuardDuty
Why wrong: GuardDuty provides findings but not raw flow log analysis.
VPC Flow Logs
VPC Flow Logs capture network traffic metadata for analysis.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
VPC Flow Logs
Option B is correct because VPC Flow Logs capture IP traffic information and can be analyzed to detect abnormal outbound traffic. Option A is wrong because GuardDuty uses VPC Flow Logs and other sources but does not provide raw flow log analysis. Option C is wrong because CloudTrail logs API calls, not network traffic. Option D is wrong because Inspector is for vulnerability assessment, not network traffic analysis.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Amazon Inspector
Why it's wrong here
Inspector is for vulnerability scanning, not network monitoring.
AWS CloudTrail
Why it's wrong here
CloudTrail logs API calls, not network traffic.
Amazon GuardDuty
Why it's wrong here
GuardDuty provides findings but not raw flow log analysis.
VPC Flow Logs
Why this is correct
VPC Flow Logs capture network traffic metadata for analysis.
Related concept
Static NAT maps one inside address to one outside address.
Common exam traps
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
A healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
What to study next
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related SCS-C02 NAT questions on configuration and troubleshooting.
Threat Detection and Incident Response — study guide chapter
Learn the concepts, then practise the questions
Threat Detection and Incident Response practice questions
Targeted practice on this topic area only
All SCS-C02 questions
1,738 questions across all exam domains
AWS Certified Security Specialty SCS-C02 study guide
Full concept coverage aligned to exam objectives
SCS-C02 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Practise SCS-C02 questions linked to Threat Detection and Incident Response.
Practise SCS-C02 questions linked to Security Logging and Monitoring.
Practise SCS-C02 questions linked to Identity and Access Management.
Practise SCS-C02 questions linked to Management and Security Governance.
Practise SCS-C02 questions linked to Infrastructure Security.
Practise SCS-C02 questions linked to Data Protection.
Practise SCS-C02 questions linked to SCS-C02 fundamentals.
Practise SCS-C02 questions linked to SCS-C02 scenario.
Practise SCS-C02 questions linked to SCS-C02 troubleshooting.
Practice this exam
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Threat Detection and Incident Response — This question tests Threat Detection and Incident Response — Static NAT maps one inside address to one outside address..
The correct answer is: VPC Flow Logs — Option B is correct because VPC Flow Logs capture IP traffic information and can be analyzed to detect abnormal outbound traffic. Option A is wrong because GuardDuty uses VPC Flow Logs and other sources but does not provide raw flow log analysis. Option C is wrong because CloudTrail logs API calls, not network traffic. Option D is wrong because Inspector is for vulnerability assessment, not network traffic analysis.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related SCS-C02 NAT questions on configuration and troubleshooting.
Static NAT maps one inside address to one outside address.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Last reviewed: Jun 20, 2026
This SCS-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SCS-C02 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.