Quick Answer
The answer is AWS CloudTrail, as it is the service specifically designed to record all API activity within an AWS account. CloudTrail captures every CreateSecurityGroup, AuthorizeSecurityGroupIngress, RevokeSecurityGroupEgress, and DeleteSecurityGroup action, providing a complete audit trail of who made the change, when it occurred, and the source IP address. On the AWS Certified SysOps Administrator Associate SOA-C02 exam, this question tests your understanding of the fundamental difference between CloudTrail for API call tracking and AWS Config for resource configuration history—a common trap is confusing the two, as Config records resource state changes but does not capture the specific API call or identity that triggered them. To audit security group changes via CloudTrail, remember that CloudTrail logs the action itself, while Config shows the resulting configuration. A helpful memory tip is "CloudTrail tracks the click, Config tracks the state."
This SOA-C02 practice question tests your understanding of monitoring, logging, and remediation. 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.
A SysOps administrator needs to audit all changes to security groups in an AWS account. Which AWS service should be used to capture these changes?
VPC Flow Logs
Why wrong: VPC Flow Logs capture IP traffic, not API calls.
AWS CloudTrail
CloudTrail logs all API calls, including security group modifications.
CloudWatch Logs
Why wrong: CloudWatch Logs collects logs, not API activity.
AWS Config
Why wrong: AWS Config records configuration changes, but the question asks for audit of changes; CloudTrail is the audit trail.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
AWS CloudTrail
AWS CloudTrail is the correct service because it records API calls made to the AWS environment, including all CreateSecurityGroup, AuthorizeSecurityGroupIngress, RevokeSecurityGroupEgress, and DeleteSecurityGroup API actions. By enabling CloudTrail trail logging, the SysOps administrator can capture a complete audit trail of who made changes, when, and from which source IP, which is essential for security group change auditing.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
VPC Flow Logs
Why it's wrong here
VPC Flow Logs capture IP traffic, not API calls.
AWS CloudTrail
Why this is correct
CloudTrail logs all API calls, including security group modifications.
Related concept
Read the scenario before looking for a memorised answer.
CloudWatch Logs
Why it's wrong here
CloudWatch Logs collects logs, not API activity.
AWS Config
Why it's wrong here
AWS Config records configuration changes, but the question asks for audit of changes; CloudTrail is the audit trail.
Common exam traps
The trap here is that candidates often confuse AWS Config (which tracks configuration state changes) with CloudTrail (which tracks API call provenance), leading them to choose Config for auditing changes when only CloudTrail provides the identity and source of the change.
Detailed technical explanation
CloudTrail records all management events (including security group modifications) as JSON log entries in an S3 bucket or CloudWatch Logs log group. Each event includes the user identity (IAM user or role), the source IP address, the user agent, and the request parameters, enabling full attribution of changes. A subtle behavior is that CloudTrail can be configured to log data events (e.g., S3 object-level operations) but security group changes are always management events and are logged by default when a trail is enabled.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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
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FAQ
Monitoring, Logging, and Remediation — This question tests Monitoring, Logging, and Remediation — Read the scenario before looking for a memorised answer..
The correct answer is: AWS CloudTrail — AWS CloudTrail is the correct service because it records API calls made to the AWS environment, including all CreateSecurityGroup, AuthorizeSecurityGroupIngress, RevokeSecurityGroupEgress, and DeleteSecurityGroup API actions. By enabling CloudTrail trail logging, the SysOps administrator can capture a complete audit trail of who made changes, when, and from which source IP, which is essential for security group change auditing.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
This SOA-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 SOA-C02 exam.
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