The answer is an IAM role that grants permissions to publish logs, along with a CloudWatch Logs log group and the VPC resource itself. These three components are required because VPC Flow Logs capture traffic metadata and must have a destination—the log group—where log streams are stored for querying via CloudWatch Logs Insights, while the IAM role provides the necessary permissions for the flow log service to write to that log group. On the AWS Certified Security Specialty SCS-C02 exam, this question tests your understanding of the foundational setup for network traffic monitoring, often appearing as a straightforward multiple-select item where a common trap is forgetting the IAM role or assuming an S3 bucket is mandatory (it is optional, not required). A reliable memory tip is to think of the acronym “LIR”: Log group, IAM role, Resource—the three pillars that must exist before a flow log can be created.
SCS-C02 Infrastructure Security Practice Question
This SCS-C02 practice question tests your understanding of infrastructure security. 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 security engineer needs to enable VPC Flow Logs to capture traffic metadata. Which THREE components are required to create a VPC Flow Log?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
A CloudWatch Logs log group to publish the flow logs.
A CloudWatch Logs log group is required because VPC Flow Logs publish traffic metadata to CloudWatch Logs as the default destination. The flow logs are stored as log streams within the specified log group, enabling querying and monitoring via CloudWatch Logs Insights. Without a log group, there is no destination for the flow log records to be sent to.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
A CloudWatch Logs log group to publish the flow logs.
Why this is correct
Flow logs are published to CloudWatch Logs.
Related concept
Read the scenario before looking for a memorised answer.
✓
A VPC, subnet, or network interface to monitor.
Why this is correct
Flow logs are created for a resource.
Related concept
Read the scenario before looking for a memorised answer.
✗
An S3 bucket to store the flow logs.
Why it's wrong here
Flow logs can go to CloudWatch Logs or S3, but S3 is optional.
✗
An Amazon Kinesis Data Firehose delivery stream.
Why it's wrong here
Kinesis is not a supported destination for VPC Flow Logs.
✓
An IAM role that grants permissions to publish logs.
Why this is correct
IAM role is required to write to CloudWatch Logs.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume S3 is mandatory because it is a common storage service, but VPC Flow Logs require either CloudWatch Logs or S3 as a destination, and the question specifies the three required components, making S3 optional and thus incorrect.
Detailed technical explanation
How to think about this question
VPC Flow Logs capture IP traffic metadata at the network interface level, including source/destination IPs, ports, protocols, and packet counts, using the AWS VPC Flow Logs service. Under the hood, flow log records are aggregated and published every 10 minutes by default, with a maximum of 60 seconds for the highest aggregation interval. In a real-world scenario, using CloudWatch Logs allows real-time monitoring and alerting via metrics filters, while S3 is better for long-term archival and cost savings.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Infrastructure Security — This question tests Infrastructure Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: A CloudWatch Logs log group to publish the flow logs. — A CloudWatch Logs log group is required because VPC Flow Logs publish traffic metadata to CloudWatch Logs as the default destination. The flow logs are stored as log streams within the specified log group, enabling querying and monitoring via CloudWatch Logs Insights. Without a log group, there is no destination for the flow log records to be sent to.
What should I do if I get this SCS-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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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
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