What term defines the strategy of copying or duplicating data for safety?

The strategy of copying or duplicating data for safety is best defined by the term "Backup." A backup involves creating a secondary copy of data that can be used to restore the original in case of data loss, corruption, or disaster. This is essential for data recovery and ensures business continuity.

While "Replication" refers to a process where data is copied from one location to another in real-time or near real-time, it is typically used for maintaining data consistency across multiple storage systems rather than solely for safety purposes. "Snapshots" provide a point-in-time copy of data, but they are often not a complete solution for long-term data safety, as they usually exist within the same environment and can be affected by issues like hardware failures. "Clustering" is a method that links multiple servers to operate together as a single system, primarily for load balancing and increased availability, rather than focusing on data duplication for safety. Thus, "Backup" is the most appropriate term for the strategy aimed specifically at data safety through copying or duplication.