A company uses Amazon Macie, AWS Firewall Manager, Amazon Inspector, and AWS Shield Advanced. The company wants to receive alerts when a DDoS attack occurs. Which solution meets this requirement?

AWS Shield Advanced is specifically designed for DDoS protection and provides detailed metrics for detected attacks. Integrating Shield Advanced with Amazon CloudWatch allows you to create alarms that trigger notifications when DDoS attack metrics (like DDoSDetected or DDoSAttackBitsPerSecond) exceed defined thresholds, ensuring timely alerts. Macie is for data discovery and classification, not DDoS detection. Inspector assesses vulnerabilities and deviations from best practices, not real-time DDoS attacks. Firewall Manager centrally manages WAF rules and security groups but doesn't inherently detect a DDoS attack itself; it relies on services like Shield Advanced or WAF to identify malicious traffic patterns.