AWS Certified Advanced Networking – Specialty (ANS-C00) — Question 165

You are the network engineer at your company, and you are noticing issues with QoS in you're the traffic to your instances hosting a VOIP program. You need to inspect the network packets to determine if it is a programming error or a networking error. How should you do this?

Answer options

• A. Configure a network monitoring program on every instance and stream the logs to an S3 bucket to be parsed.
• B. Use CloudWatch
• C. Set up another instance with an ENI added to act as a monitoring interface. Set the port to "promiscuous mode" and sniff the traffic to analyze the packets. Then output this single stream to an S3 bucket to be parsed.
• D. Inspect Flow Logs

Correct answer: A

Explanation

The correct answer is A because configuring a network monitoring program on each instance allows for detailed packet analysis directly from the source, helping to identify the root cause of the QoS issues. Option B, using CloudWatch, may not provide the granular packet-level data needed for this specific troubleshooting. Option C, while it suggests monitoring, involves additional complexity and may not effectively pinpoint the issue as directly as option A. Option D, inspecting Flow Logs, provides high-level traffic flow data but lacks the detail required for specific packet analysis.