Which of the following technologies causes a single processor to appear as multiple processors within System Properties in a Windows Server?

RISC (Reduced Instruction Set Computing) is a processor architecture design principle that focuses on a smaller, highly optimized set of instructions, not a technology that makes a single physical processor appear as multiple.

Multicore technology involves integrating multiple independent processing units, or "cores," onto a single physical processor chip. Each core can execute instructions independently, making the single physical processor appear as multiple logical processors within the operating system, such as in Windows Server's System Properties.

Symmetric multi-processing (SMP) is a system architecture where multiple physical processors share a single operating system instance and memory, not a technology that makes a single processor appear as many.

Hyper-V is a virtualization technology that allows multiple virtual machines to run on a physical server, but it does not cause a single physical processor to appear as multiple processors within the host operating system's System Properties.