A public cloud, such as Microsoft Azure, Google Cloud Platform (GCP) and Amazon Web Services (AWS), relies on a shared infrastructure. Together with others, you use a provider's cloud services.
The Proximus public cloud is a shared infrastructure in the Proximus data centers. Data remains in Belgium.
A private cloud is the opposite of a public cloud. The hardware is located in a completely segregated cloud environment (on premises in your company) that will be used only by you.
The hybrid cloud combines the advantages of the three types of cloud.
Multi-cloud stands for the combined use of different public cloud environments.