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Question 578 - SAA-C03 discussion

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A city has deployed a web application running on Amazon EC2 instances behind an Application Load Balancer (ALB). The application's users have reported sporadic performance, which appears to be related to DDoS attacks originating from random IP addresses. The city needs a solution that requires minimal configuration changes and provides an audit trail for the DDoS sources.

Which solution meets these requirements?

A.
Enable an AWS WAF web ACL on the ALB, and configure rules to block traffic from unknown sources.
Answers
A.
Enable an AWS WAF web ACL on the ALB, and configure rules to block traffic from unknown sources.
B.
Subscribe to Amazon Inspector. Engage the AWS DDoS Response Team (DRT) to integrate mitigating controls into the service.
Answers
B.
Subscribe to Amazon Inspector. Engage the AWS DDoS Response Team (DRT) to integrate mitigating controls into the service.
C.
Subscribe to AWS Shield Advanced. Engage the AWS DDoS Response Team (DRT) to integrate mitigating controls into the service.
Answers
C.
Subscribe to AWS Shield Advanced. Engage the AWS DDoS Response Team (DRT) to integrate mitigating controls into the service.
D.
Create an Amazon CloudFront distribution for the application, and set the ALB as the origin. Enable an AWS WAF web ACL on the distribution, and configure rules to block traffic from unknown sources.
Answers
D.
Create an Amazon CloudFront distribution for the application, and set the ALB as the origin. Enable an AWS WAF web ACL on the distribution, and configure rules to block traffic from unknown sources.
Suggested answer: C

Explanation:

To protect the web application from DDoS attacks originating from random IP addresses, a solutions architect should subscribe to AWS Shield Advanced and engage the AWS DDoS Response Team (DRT) to integrate mitigating controls into the service. AWS Shield Advanced is a managed service that provides protection against large and sophisticated DDoS attacks, with access to 24/7 support and response from the DRT. The DRT can help the city configure proactive and reactive safeguards, such as AWS WAF rules, rate-based rules, and network ACLs, to block malicious traffic and improve the application's resilience. The service also provides an audit trail for the DDoS sources through detailed attack reports and Amazon CloudWatch metrics.

asked 16/09/2024
Abbas Jabbari
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