Final answer:
The enhancement to client-server computing that allows more than one server to run on the same physical piece of equipment is called virtualization. It enables multiple, independent servers to operate on a single hardware platform and offers several benefits over the use of traditional minicomputers.
Step-by-step explanation:
One recent enhancement to client-server computing is virtualization, in which more than one server can run on the same physical piece of equipment. This advancement allows multiple virtual servers to operate independently on a single hardware platform, utilizing a hypervisor to manage the virtual environments. This technique has many benefits, like cost reduction, improved resource utilization, and simplified management. It contrasts with the historical use of minicomputers, which supported many users but had less computing power than mainframes and have been largely replaced by more powerful personal computers.