Which concept allows for resource sharing across multiple tenants in cloud computing?

The concept that allows for resource sharing across multiple tenants in cloud computing is virtualization technologies. Virtualization creates a layer of abstraction over physical hardware, allowing multiple virtual machines or instances to run on a single physical server. This enables different tenants to operate within their own isolated environments while sharing the underlying physical resources, such as CPU, memory, and storage.

Through virtualization, cloud service providers can efficiently allocate resources dynamically based on demand. For example, multiple organizations can run their applications on the same hardware without interfering with one another, leading to optimized resource usage, reduced costs, and enhanced scalability. Overall, virtualization technologies are fundamental to cloud computing because they facilitate multi-tenancy, allowing diverse customers to utilize shared infrastructure securely and efficiently.