Which AWS service helps provide highly available applications with quick failover across Regions and Availability Zones?

AWS Global Accelerator improves application availability and performance by directing user traffic to the optimal AWS endpoint over the AWS global network. It uses static IP addresses as fixed entry points, allowing for quick failover across Regions and Availability Zones without DNS propagation delays. If an endpoint becomes unhealthy, Global Accelerator automatically routes traffic to the next healthy endpoint. AWS WAF is a web application firewall that protects against common web exploits. AWS Shield provides DDoS protection. AWS Direct Connect creates a dedicated network connection from your premises to AWS. While these services contribute to overall security or connectivity, they do not primarily provide quick failover across Regions and Availability Zones for application availability in the same way Global Accelerator does.