A Registry is a repository store where container images are housed. Docker Registries exist in the following forms:
Docker Hub
A public registry with open source contribution to thousands of repositories and blueprint containers.
Docker Hub Enterprise (DHE)
An on premise Docker Hub registry for proprietary enterprise container images.
Private Repository
A private registry for proprietary enterprise container images.
TAR File Repository
A file drop area used to store TAR files of proprietary enterprise docker images.