An international company that provides tsunami early warning will use global IoT devices to collect wave data and send it to AWS as quickly as possible. They have three operation centers, each with a Direct Connect connection to AWS and at least two upstream ISPs to the internet. The company owns provider-independent IP space. IoT devices use TCP and have both landline and mobile internet connectivity. The solution will span multiple AWS Regions and Route 53 will be used for DNS. Which design provides the HIGHEST availability for connectivity from IoT devices to AWS services?

AWS Global Accelerator improves availability and performance by directing traffic to the nearest healthy endpoint. It uses static IP addresses that act as a fixed entry point, and traffic is routed over the AWS global network, bypassing congested public internet paths. This is ideal for IoT devices requiring high availability and low latency across multiple Regions. The health checks ensure traffic is only sent to healthy endpoints, and Regional endpoint groups provide disaster recovery. CloudFront is primarily a content delivery network (CDN) and is less suited for general IoT data ingestion that requires persistent connections or bidirectional communication. Route 53 latency-based routing relies on DNS resolution, which can be cached and may not react as quickly to real-time network conditions or endpoint health changes as Global Accelerator. BYOIP with advertising the same IP addresses from multiple Regions can lead to routing instability and is not a managed solution for traffic optimization or health checking.