Which kind of system feature specifically addresses unexpected power failures?

Power redundancy specifically addresses unexpected power failures by incorporating backup power sources to ensure that systems remain operational even when the primary power source is lost. This may involve using uninterruptible power supplies (UPS), backup generators, or redundant power supplies within servers. By having these features in place, organizations can protect their critical systems and data from interruption, allowing for continuous operation and minimizing downtime related to power failures.

In contrast, server redundancy refers to having multiple servers that can take over if one fails, network redundancy involves alternate paths in a network to maintain connectivity even if one segment goes down, and data redundancy usually means storing copies of data in different locations to prevent data loss. While these aspects contribute to overall system reliability, they do not directly address the issue of unexpected power loss like power redundancy does.