Which of the following are features for monitoring application load balancer? Choose the 3 correct options.
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A. B. C. D. E.Answer: A, B, D.
https://docs.aws.amazon.com/elasticloadbalancing/latest/application/load-balancer-monitoring.htmlThe correct options for monitoring an Application Load Balancer (ALB) in AWS are:
A. CloudWatch metrics C. VPC Flow Logs E. EC2 Flow Logs.
Here's a detailed explanation for each option:
A. CloudWatch Metrics: Amazon CloudWatch is a monitoring service that provides metrics on the performance of various AWS resources, including ALBs. With CloudWatch, you can monitor the request count, latency, and other metrics for an ALB. These metrics can be used to set alarms and automate actions based on certain thresholds.
C. VPC Flow Logs: Amazon VPC Flow Logs is a feature that enables you to capture information about the IP traffic going to and from network interfaces in your VPC. By enabling VPC Flow Logs for your VPC, you can capture information about the traffic going to and from the ALB. This information can be used for security analysis, troubleshooting, and compliance auditing.
E. EC2 Flow Logs: Similar to VPC Flow Logs, EC2 Flow Logs capture information about the IP traffic going to and from network interfaces of EC2 instances. Since the ALB is built on top of EC2 instances, you can use EC2 Flow Logs to capture information about the traffic going to and from the ALB. This information can be used for the same purposes as VPC Flow Logs.
B. Request Tracing: Request tracing is not a feature for monitoring an ALB. However, AWS offers AWS X-Ray, which is a service that provides request tracing for distributed applications, including those that use an ALB. With X-Ray, you can trace requests across multiple services and get a comprehensive view of how they interact with each other. While this is useful for troubleshooting and performance optimization, it is not a feature for monitoring an ALB.
D. CloudTrail Logs: AWS CloudTrail is a service that provides logs of API calls made to various AWS resources. While CloudTrail can provide some information about the ALB, it is not a feature for monitoring the ALB itself. CloudTrail logs can be used for security analysis and compliance auditing, but they do not provide the same level of visibility into the performance of the ALB as CloudWatch metrics, VPC Flow Logs, or EC2 Flow Logs.