A company has an internal web-based application that employees use. The company hosts the application over a VPN in the company’s on-premises network. The application runs on a fleet of Amazon EC2 instances in a private subnet behind a Network Load Balancer (NLB) in the same subnet. The instances are in an Amazon EC2 Auto Scaling group. During a recent security incident, SQL injection occurred on the application. A network engineer must implement a solution to prevent SQL injection attacks in the future. Which combination of steps will meet these requirements? (Choose three.)
Select 3 answers.
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