A company hosts a website on Amazon EC2 instances behind an Application Load Balancer (ALB). The website serves static content. Traffic is increasing and the company is concerned about rising costs. What should the company do to reduce costs?
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Correct answer: Create an Amazon CloudFront distribution to cache static files at edge locations..
Why this is the answer
Caching static content at Amazon CloudFront edge locations reduces the load on EC2 instances and the ALB, lowering compute and data transfer costs. CloudFront delivers content closer to users, improving performance and reducing latency. ElastiCache is an in-memory cache primarily used for database caching, not for serving static website content directly from an ALB. AWS WAF is a web application firewall for security, not for caching static files to reduce costs. Creating a second ALB in another region increases infrastructure costs and is a strategy for high availability and disaster recovery, not primarily for cost reduction of static content delivery.
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