ANS-C01 Question 375
Select 2You are troubleshooting intermittent connectivity issues between an application running in your VPC and an external on-premises data center, which is connected via AWS Direct Connect. You suspect packet loss is occurring. Which AWS services and features can you use to identify and analyze the source of the packet loss?
- A
Enable VPC Flow Logs for the relevant subnets and analyze the traffic patterns.
- B
Use CloudWatch Metrics for the Direct Connect connection to monitor errors and throughput.
- C
Run a Network Performance Benchmark test using the AWS Network Manager.
- D
Inspect the logs from AWS CloudTrail for API calls related to the Direct Connect connection.
- E
Utilize AWS Reachability Analyzer to test for potential connectivity misconfigurations.
Show answer and explanation
Correct answers: A, B
Explanation
To effectively diagnose packet loss and network performance issues, you can enable VPC Flow Logs to observe traffic patterns and use CloudWatch Metrics to monitor the health and performance of the Direct Connect connection. These tools provide detailed data relevant to network performance. Other options, such as Reachability Analyzer and CloudTrail, are useful for different purposes but do not directly address packet loss troubleshooting.
- A. Correct.
VPC Flow Logs capture IP traffic metadata for resources within your VPC, which can help you analyze the traffic and identify packet loss patterns. This is a valid approach to troubleshooting network performance issues.
- B. Correct.
CloudWatch Metrics for AWS Direct Connect provide valuable insights into the performance of the connection, such as errors, latency, and throughput, which can indicate packet loss or other performance issues.
- C. Incorrect.
AWS Network Manager does not provide tools to directly measure or analyze packet loss. Instead, it focuses on managing and monitoring global networks.
- D. Incorrect.
CloudTrail logs are used to monitor API calls within your AWS account, but they do not provide information on network traffic or packet loss.
- E. Incorrect.
AWS Reachability Analyzer checks for connectivity paths and misconfigurations but does not analyze packet loss or network performance issues.