You have an ELB setup in AWS with EC2 instances running behind it. You have been requested to monitor the incoming connections to the ELB. Which of the below options can suffice this requirement?

1. A. UseAWSCIoudTrail with your load balancer
2. B. Enable access logs on the load balancer
3. C. Use a CloudWatch Logs Agent
4. D. Create a custom metric CloudWatch filter on your load balancer

Correct Answer: B
Clastic Load Balancing provides access logs that capture detailed information about requests sent to your load balancer. Cach log contains information such as the time the request was received, the client's IP address, latencies, request paths, and server responses. You can use these access logs to analyze traffic patterns and to troubleshoot issues.
Option A is invalid because this service will monitor all AWS services Option C and D are invalid since CLB already provides a logging feature.
For more information on ELB access logs, please refer to the below document link: from AWS
http://docs.aws.amazon.com/elasticloadbalancing/latest/classic/access-log-collection.html