Final answer:
The data replication strategy in question is known as continuous data protection (CDP), where changes are time-stamped and immediately saved to secondary systems.
Step-by-step explanation:
The data replication strategy where all data changes are time-stamped and saved to secondary systems as the changes are happening is known as continuous data protection (CDP). This process ensures that every change made to the primary data is recorded in real-time, providing a running history of data activity. This is critical for scenarios where data integrity and instant recovery are paramount. In the event of data corruption or loss, CDP allows for recovery to any point in time, mitigating the risks associated with data loss