An organization is looking to implement an online web-based mail system to allow employees to access email while not on the network. The organization wants to have complete control over the servers…

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Public cloud typically involves shared infrastructure where the customer does not have complete control over the underlying physical servers, only over virtual resources or services.

Hybrid cloud combines on-premise and public cloud resources, which would not grant complete control over all servers and data across the entire solution, particularly for components in the public cloud.

Off-premise hosting, such as dedicated server hosting or colocation, allows an organization to place their physical servers in a third-party data center while maintaining complete administrative control over the server hardware, operating systems, and data. This option satisfies the requirement for full control and external accessibility without the burden of managing a private data center facility.

On-premise hosting means the servers are located within the organization's own physical facilities, which provides complete control but often involves significant capital and operational expenses that off-premise hosting seeks to mitigate while still offering control.