Which technology allows multiple virtual machines to share the same physical hardware resources?

The hypervisor is the technology that enables multiple virtual machines (VMs) to share the same physical hardware resources. It acts as an intermediary layer between the hardware and the operating systems of the VMs, allowing them to operate concurrently on the same physical server. The hypervisor accomplishes this by allocating resources such as CPU, memory, and storage from the physical server to each VM as needed.

This resource management ensures that even though the VMs are running independently and possibly using different operating systems, they can efficiently share and utilize the underlying physical hardware. The hypervisor maintains isolation between the VMs, ensuring that they do not interfere with one another while providing the required performance.

While the other options play important roles in a virtualized environment, they do not specifically facilitate the sharing of physical hardware resources among multiple VMs. A Storage Area Network (SAN) focuses on storage aspects, a Virtual Switch handles network connections, and virtualization is the broader concept that encompasses the use of hypervisors and other technologies to create VMs. However, the hypervisor is the key technology specifically responsible for sharing physical resources among VMs.