Which AWS tool provides rightsizing recommendations for EC2 instances at no extra charge?
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Correct answer: AWS Cost Explorer.
Why this is the answer
AWS Cost Explorer provides rightsizing recommendations for EC2 instances at no extra charge. It analyzes your EC2 usage and identifies opportunities to reduce costs by recommending instances that are better suited to your workload, such as switching to a smaller instance type or a different instance family. The AWS Well-Architected Tool helps you review your architecture against best practices, but doesn't offer specific rightsizing recommendations. Amazon CloudWatch monitors resources and applications, providing metrics and logs, but not cost optimization recommendations. Amazon S3 analytics provides insights into S3 storage usage and access patterns, unrelated to EC2 instance rightsizing.
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