An architect needs to block a specific IP address that is launching a DDoS attack on the web servers. Where should this block be implemented?

Direct Answer (Verified)Reviewed by Sunny (Senior Cloud Engineer)

Correct Answer: Network ACL (using a Deny rule)

Security Groups do not support 'Deny' rules. To block a specific IP, you must use a Network ACL....

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Real Exam ScenarioSecurity Groups

An architect needs to block a specific IP address that is launching a DDoS attack on the web servers. Where should this block be implemented?

✓ Correct Answer & ExplanationSecurity Groups

Correct Answer

Network ACL (using a Deny rule)

Why This Answer Is Correct

Security Groups do not support 'Deny' rules. To block a specific IP, you must use a Network ACL.

📚 What This Question Tests

This question evaluates your knowledge of Security Groups — a core concept tested in AWS Certified Solutions Architect – Associate (SAA-C03). Understanding Security Groups is essential for designing scalable, secure, and cost-effective cloud architectures. Mastery of this topic will help you answer scenario-based questions confidently on exam day.