Which term refers to multiple customers using the same public cloud infrastructure?

The term that refers to multiple customers using the same public cloud infrastructure is "multitenant." In a multitenancy architecture, resources and services are shared among various tenants or customers while maintaining security and data separation between them. This model is efficient because it allows cloud providers to optimize resource utilization and reduce costs by serving many customers from a single physical infrastructure.

This approach is characteristic of public cloud services, where multiple users or organizations can leverage the cloud provider's infrastructure without each having to maintain their separate physical servers. Each tenant operates independently, with their data and applications isolated from others, ensuring security and privacy.

The other choices do not accurately describe this concept. A private tenant typically refers to a single customer who has exclusive use of a private cloud environment, which is not shared. A dedicated instance denotes a more isolated environment where resources are allocated to a single customer but does not imply sharing among multiple users. Lastly, "shared tenant" is not a standard term in cloud computing, making "multitenant" the appropriate designation for the scenario where multiple customers utilize the same infrastructure in a secure and efficient manner.