In a highly available SAN configuration that guarantees no data loss, which of the following replication approaches is required?

Point-in-time replication (e.g., snapshots) captures data at a specific moment but does not continuously replicate, meaning data written after the snapshot but before a failure could be lost.

Synchronous replication ensures that data is written to both the primary storage and the secondary, replicated storage site concurrently. A write operation is not acknowledged as complete to the application until both sites confirm the write, thereby guaranteeing zero data loss (RPO=0) in the event of a primary site failure.

Journaling is a file system recovery mechanism that records changes before they are committed to the main file system, but it's not a replication approach for SANs.

Asynchronous replication acknowledges writes on the primary site before they are confirmed on the secondary site, which can lead to data loss during a primary site failure (RPO > 0).