Your organization operates two virtualized data centers: one on-premises and one hosted in a third-party colocation facility. Management wants end users to request virtual machines through a self-service portal, and all compute, storage, and network resources must remain dedicated exclusively to your organization to satisfy compliance requirements. According to the deployment models defined in NIST SP 800-145, which type of cloud should you implement?
A private cloud is provisioned for the exclusive use of a single organization. NIST specifies that the underlying infrastructure may be owned, managed, and operated by the organization itself, by a third party, or by a combination of both, and it may exist on or off premises. Because the resources in the scenario are reserved solely for one company-even though some equipment is located in a provider-run colocation facility-the environment fits the definition of a private cloud.
A public cloud would share multi-tenant resources with the general public, violating the exclusivity requirement. A community cloud serves several organizations that share a common mission or compliance need, not just one. A hybrid cloud blends two or more distinct deployment models (such as private and public) but still includes at least one resource pool open to external tenants; this scenario keeps all resources dedicated to a single tenant, so it is not hybrid.