Explore SNS and SQS notification flow

Use the SNS and SQS flow simulator to explore how CloudWatch alarms connect to notification targets through SNS, and how fan-out architectures use SQS queues for async processing.

The simulator shows the full flow: CloudWatch Alarm → SNS Topic → Subscribers (Email, SMS, Lambda, SQS). Toggle between Standard and FIFO topic types, configure fan-out with multiple SQS queues, and see how message filtering sends different message types to different queues.

Question: A CloudWatch alarm triggers an SNS topic that has 3 SQS queue subscribers. One queue's consumer is down. What happens to that queue's messages?