Which AWS service allows you to run Docker applications across a cluster of EC2 instances?

The correct response indicates that Amazon Elastic Container Service (ECS) is the service designed specifically to facilitate the deployment and management of Docker containers across a cluster of Amazon EC2 instances. ECS provides a highly scalable and high-performance container orchestration service that allows users to run applications in Docker containers. This is particularly beneficial for managing microservices architectures and scaling them based on demand.

ECS integrates seamlessly with other AWS services, making it easier to deploy applications while leveraging the cloud's full spectrum of capabilities. It offers features like load balancing, auto-scaling, and task management that help streamline the deployment process. By utilizing ECS, developers can focus on application logic rather than infrastructure management, optimizing both productivity and resource utilization.

Other options focus on different aspects of container management. For example, Amazon Elastic Container Registry is a managed Docker container registry that allows storage, management, and deployment of Docker container images but does not itself run applications. Amazon Elastic Kubernetes Service, while also a container orchestration service, specifically manages Kubernetes clusters, which may complicate the deployment for users already accustomed to ECS. AWS Fargate, on the other hand, is a serverless compute engine for containers that works in conjunction with ECS and Amazon EKS, meaning it abstracts the underlying infrastructure