A company has two data centers, 25 kilometers (15.5 miles) apart. Data is replicated from the primary to the secondary site using a method that commits data to storage at both sites before the write i

Asynchronous continuous replication acknowledges the write to the host once data is committed to the primary storage, then replicates to the secondary site, allowing for a potential data loss window (non-zero RPO).

Synchronous remote replication ensures that data is written to both the primary storage and the remote secondary storage array before the I/O write is acknowledged back to the host. This method provides zero Recovery Point Objective (RPO) because no data is lost during a failover, making it suitable for high-availability scenarios over distances where latency is acceptable, such as 25 km.

Redundant offsite backup refers to storing copies of data at a different location for disaster recovery, but it is not a real-time replication method that commits writes to both sites before host acknowledgement.

Asynchronous local replication usually refers to replication within the same data center or even within the same storage array, and it does not guarantee immediate commitment at two separate sites before host acknowledgment.