A company has deployed an eCommerce application that is used by thousands of customers to place online orders. The application runs on Amazon ECS tasks behind an Application Load Balancer (ALB) and data is stored in an Amazon DynamoDB table. The application has recently experienced attacks that caused application slowdowns and outages. The company must prevent attacks and ensure business continuity with minimal service interruptions. Which combination of steps will meet these requirements MOST cost-effectively? (Select TWO.)