Which cloud model allows several organizations to share the costs of either a hosted private cloud or a fully private cloud?

The community cloud model is designed specifically for shared infrastructure among several organizations that have common concerns, such as security requirements, compliance, or similar missions. By pooling resources in a community cloud, organizations can share the costs associated with maintaining either a hosted private cloud or a fully private cloud environment. This model not only reduces the financial burden on individual organizations but also allows them to benefit from the shared knowledge and resources of their peers, fostering collaboration and enhancing security and compliance efforts.

In contrast, the private cloud model is dedicated to a single organization, which means that costs are borne solely by that entity. The public cloud model offers services and resources over the internet to the public at large, typically on a pay-per-use basis, thereby eliminating shared costs as the infrastructure is owned and operated by third parties. The multi-tenant model refers to the architecture where multiple customers share a single instance of an application while keeping their data isolated, often associated with public cloud offerings. However, it does not inherently provide the shared infrastructure costs that characterize a community cloud.