The answer is to enable VPC Flow Logs on the ENIs attached to the ECS tasks. This solution is correct because ECS tasks using the Fargate launch type with awsvpc network mode assign each task a dedicated elastic network interface, and VPC Flow Logs capture metadata about all IP traffic flowing through those ENIs, including source and destination IPs, ports, and protocols. On the AWS Certified Solutions Architect Professional SAP-C02 exam, this question tests your understanding of the boundary between network-level diagnostics and application-level monitoring—a common trap is confusing VPC Flow Logs with AWS X-Ray or CloudWatch Logs, which capture traces and log output respectively, not raw network traffic. Remember that to capture network traffic between ECS Fargate containers, you must first ensure the tasks use awsvpc mode so each container gets its own ENI, then enable VPC Flow Logs on those ENIs. Memory tip: "Flow for the Flows, X-Ray for the Traces"—VPC Flow Logs handle network flows, while X-Ray handles application traces.
SAP-C02 Continuous Improvement for Existing Solutions Practice Question
This SAP-C02 practice question tests your understanding of continuous improvement for existing solutions. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 runs a containerized microservices application on Amazon ECS with Fargate launch type. The application experiences intermittent latency spikes. The team wants to capture network traffic between containers for troubleshooting. Which solution should they implement?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable VPC Flow Logs on the ENIs attached to the ECS tasks.
Option D is correct because using Amazon ECS task networking with VPC and enabling VPC Flow Logs captures network traffic metadata. Option A is wrong because AWS X-Ray captures application-level traces, not network packets. Option B is wrong because CloudWatch Logs agent captures logs, not network traffic. Option C is wrong because ECS Exec allows shell access but not traffic capture.
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.
✗
Enable AWS X-Ray tracing on the ECS tasks.
Why it's wrong here
X-Ray traces application requests, not network packets.
✗
Configure the awslogs driver to send container logs to CloudWatch Logs.
Why it's wrong here
Logs are not network traffic.
✗
Use Amazon ECS Exec to access containers and run tcpdump.
Why it's wrong here
Requires manual intervention and does not provide continuous capture.
✓
Enable VPC Flow Logs on the ENIs attached to the ECS tasks.
Why this is correct
Flow Logs capture IP traffic metadata.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
Identify which SAP-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Continuous Improvement for Existing Solutions — This question tests Continuous Improvement for Existing Solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable VPC Flow Logs on the ENIs attached to the ECS tasks. — Option D is correct because using Amazon ECS task networking with VPC and enabling VPC Flow Logs captures network traffic metadata. Option A is wrong because AWS X-Ray captures application-level traces, not network packets. Option B is wrong because CloudWatch Logs agent captures logs, not network traffic. Option C is wrong because ECS Exec allows shell access but not traffic capture.
What should I do if I get this SAP-C02 question wrong?
Identify which SAP-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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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