SOA-C02 Question 277
Select 2You have been tasked with troubleshooting intermittent connectivity issues reported by users accessing an application hosted behind an Application Load Balancer (ALB). To investigate the issue, you decide to enable and analyze the ALB access logs. Which of the following pieces of information can you derive from the ALB access logs to help identify the root cause? (Select TWO)
- A
The client IP address making the request
- B
The number of denied requests due to AWS WAF rules
- C
The response time for each request served by the ALB
- D
The specific EC2 instance or target that handled the request
- E
Detailed error messages from the application running on the target instance
Show answer and explanation
Correct answers: A, C
Explanation
ALB access logs are a valuable troubleshooting tool as they provide details such as the client IP address and response times for requests handled by the ALB. These logs do not include WAF-specific data, target-level details, or application-level error messages. To interpret those, you need to check AWS WAF logs or application logs respectively.
- A. Correct.
Correct: ALB access logs include information about the client IP address, which can help identify the source of requests.
- B. Incorrect.
Incorrect: While AWS WAF logs provide information about denied requests, ALB access logs do not include this data.
- C. Correct.
Correct: ALB access logs contain data about the request processing time, which can help you identify latency issues.
- D. Incorrect.
Incorrect: ALB access logs do not specify which exact EC2 instance or target responded to the request; they only include target group-level information.
- E. Incorrect.
Incorrect: ALB access logs do not include application-level error messages. For such details, you would need to check application logs on the target instances.