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SCS-C02 · Question #67

SCS-C02 Question #67: Real Exam Question with Answer & Explanation

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Submitted by kim_seoul· Mar 6, 2026

Question

A company is hosting a web application on Amazon EC2 instances behind an Application Load Balancer (ALB). The application has become the target of a DoS attack. Application logging shows that requests are coming from a small number of client IP addresses, but the addresses change regularly. The company needs to block the malicious traffic with a solution that requires the least amount of ongoing effort. Which solution meets these requirements?

Options

  • ACreate an AWS WAF rate-based rule, and attach it to the ALB.
  • BUpdate the security group that is attached to the ALB to block the attacking IP addresses.
  • CUpdate the ALB subnet's network ACL to block the attacking client IP addresses.
  • DCreate an AWS WAF rate-based rule, and attach it to the security group of the EC2 instances.

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