Data replication is being designed as part of a data protection setup to be run over the network. Which replication strategy is best suited when the primary and secondary systems are physically…

Synchronous replication ensures every write operation on the primary is immediately mirrored to the secondary before the write is acknowledged, guaranteeing zero data loss and real-time consistency. This strategy requires very low latency between sites, making it practical only when the primary and secondary systems are physically close. Over long distances, the round-trip time introduced by synchronous replication would significantly degrade application performance.

Snapshot replication captures point-in-time copies at scheduled intervals rather than replicating data continuously in real time, which introduces potential data loss equal to the snapshot interval.

Transactional replication is a database-specific technique that replicates individual committed transactions, but it is not a general-purpose network replication strategy suited specifically to physically close sites.

Direct replication is not a recognized standard replication strategy and does not describe a defined method for continuous or scheduled data synchronization between systems.