The answer is to configure VPC Flow Logs to send to Amazon Kinesis Data Firehose in each account, which delivers to a central Amazon OpenSearch Service domain. This is correct because Kinesis Data Firehose acts as a serverless, scalable ingestion layer that can receive flow logs directly from each account’s VPC and stream them into a single OpenSearch domain for near-real-time aggregation and analysis, eliminating the overhead of cross-account S3 replication or managing EC2-based log shippers. On the AWS Certified Security Specialty SCS-C02 exam, this scenario tests your understanding of centralized log architectures that minimize operational complexity while supporting real-time security monitoring—a common trap is choosing S3 cross-account replication, which introduces latency and storage costs. Remember the memory tip: “Firehose to OpenSearch for flow logs without the hose” — it’s the most direct, serverless path for centralizing VPC flow logs analysis across accounts.
SCS-C02 Threat Detection and Incident Response Practice Question
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.
A company uses AWS Organizations with multiple accounts. The security team wants to centrally aggregate and analyze VPC Flow Logs from all accounts. Which solution is MOST efficient and scalable?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure VPC Flow Logs to send to Amazon Kinesis Data Firehose in each account, which delivers to a central Amazon OpenSearch Service domain.
Option D is correct because Amazon Kinesis Data Firehose can directly receive VPC Flow Logs from each account and deliver them to a centralized Amazon OpenSearch Service domain, enabling near-real-time aggregation and analysis without intermediate storage or replication overhead. This architecture is serverless, scales automatically, and avoids the complexity of managing cross-account S3 replication or EC2 instances, making it the most efficient and scalable solution for centralized log analysis.
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.
✗
Configure VPC Flow Logs to send to an S3 bucket in each account and use S3 Cross-Region Replication to a central bucket.
Why it's wrong here
Lacks real-time analysis capabilities.
✗
Launch Amazon EC2 instances in each account to run tcpdump and send logs to a central S3 bucket.
Why it's wrong here
High overhead and not a managed solution.
✗
Configure VPC Flow Logs to send to CloudWatch Logs in each account and use cross-account CloudWatch dashboards.
Why it's wrong here
Requires cross-account configuration and is less scalable.
✓
Configure VPC Flow Logs to send to Amazon Kinesis Data Firehose in each account, which delivers to a central Amazon OpenSearch Service domain.
Why this is correct
Scalable, real-time, and centralized.
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 default to S3-based solutions (Option A) because they are familiar with S3 for log storage, but they overlook that Kinesis Data Firehose provides a more direct, serverless pipeline for real-time analysis without the latency and complexity of S3 replication.
Detailed technical explanation
How to think about this question
VPC Flow Logs can be published directly to Amazon Kinesis Data Firehose, which buffers and transforms the data before delivering it to Amazon OpenSearch Service. Under the hood, Firehose uses a Lambda function for optional log transformation (e.g., converting to JSON) and batches records to optimize indexing performance in OpenSearch. In a real-world multi-account setup, you would use AWS Organizations to centrally manage a Kinesis Data Firehose delivery stream in a logging account, with each account's VPC Flow Logs configured to publish to that stream via cross-account IAM roles, ensuring low-latency aggregation and immediate searchability.
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.
Threat Detection and Incident Response — This question tests Threat Detection and Incident Response — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Configure VPC Flow Logs to send to Amazon Kinesis Data Firehose in each account, which delivers to a central Amazon OpenSearch Service domain. — Option D is correct because Amazon Kinesis Data Firehose can directly receive VPC Flow Logs from each account and deliver them to a centralized Amazon OpenSearch Service domain, enabling near-real-time aggregation and analysis without intermediate storage or replication overhead. This architecture is serverless, scales automatically, and avoids the complexity of managing cross-account S3 replication or EC2 instances, making it the most efficient and scalable solution for centralized log analysis.
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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Question Discussion
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