What device should a desktop computer be connected to in order to protect against voltage peaks?

A surge protector is specifically designed to safeguard electronic devices against voltage spikes, commonly referred to as surges. These surges can occur due to various reasons, including lightning strikes, power outages, or fluctuations in utility service. Connecting a desktop computer to a surge protector ensures that excess voltage is redirected away from the computer, thereby preventing potential damage to sensitive internal components.

While a power strip can provide multiple outlets for devices, it does not necessarily offer protection from surges. An extension cord merely extends the reach of power without any protective features. A UPS, on the other hand, provides power during outages and can also have surge protection capabilities, but its primary function is to supply backup power. In this case, the most direct and appropriate answer for specifically protecting against voltage peaks is the surge protector.