What is the function of a UPS?

A UPS, or Uninterruptible Power Supply, is primarily designed to provide backup power to a computer during a power outage. Its role is crucial for maintaining the operation of electronic devices when the primary power source becomes unstable or is interrupted. This allows users to save their work and shut down their systems properly to avoid data loss or damage to hardware.

In addition to providing backup power, a UPS often includes features such as surge protection and voltage regulation, which further protect connected devices from power fluctuations. This is particularly important for sensitive equipment like computers and servers, which can be adversely affected by sudden interruptions in power.

The other options do not align with the primary function of a UPS. Protection against viruses is more closely related to antivirus software, enhancing internet connectivity involves networking devices and configurations, and cooling down computer hardware pertains to cooling systems like fans or liquid cooling solutions. Thus, the clear function of a UPS is its role in ensuring a continuous power supply to critical devices during outages.