JFrog Artifactory serves as an intermediary between developers and Docker Hub, implementing the Docker Registry API specification to efficiently handle remote Docker repositories. By proxying public or private Docker repositories and caching images locally after their initial download, Artifactory reduces network traffic and shields users from potential network or resource issues, ensuring consistent access to Docker images. This local caching mechanism benefits build servers by minimizing network congestion and accelerating the build process, as it reduces the need to repeatedly download large volumes of data, thereby enhancing efficiency and reliability for developers and their projects.