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SCS-C02 · Question #327

SCS-C02 Question #327: Real Exam Question with Answer & Explanation

The correct answer is C: Change the Inbound NACL to deny access from the suspecting IP. Option A and B are invalid because by default the Security Groups already block traffic. You can use NACL's as an additional security layer for the subnet to deny traffic. Option D is invalid since just changing the Inbound Rules is sufficient.

Submitted by hans_de· Mar 6, 2026

Question

A company hosts a popular web application that connects to an Amazon RDS MySQL DB instance running in a private VPC subnet that was created with default ACL settings. The IT Security department has a suspicion that a DDos attack is coming from a suspecting IP. How can you protect the subnets from this attack?

Options

  • AChange the Inbound Security Groups to deny access from the suspecting IP
  • BChange the Outbound Security Groups to deny access from the suspecting IP
  • CChange the Inbound NACL to deny access from the suspecting IP
  • DChange the Outbound NACL to deny access from the suspecting IP

Explanation

Option A and B are invalid because by default the Security Groups already block traffic. You can use NACL's as an additional security layer for the subnet to deny traffic. Option D is invalid since just changing the Inbound Rules is sufficient.

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