What does a uniterruptible power supply (UPS) provide?

A Uninterruptible Power Supply (UPS) is primarily designed to provide electric current during a power outage. Its main function is to ensure that devices stay powered for a limited time when the main electrical supply fails. This is crucial for protecting data and allowing users to save their work or safely shut down their systems, especially for critical applications or when powering essential equipment like servers and network devices.

While UPS systems can offer some additional benefits, such as surge protection and regulation of voltage, their defining characteristic is the immediate supply of electricity when there is an interruption in the main power source. Thus, the correct choice emphasizes the UPS's role in maintaining power continuity for electronic devices, allowing for operational resilience in the face of power issues.