Data needs to be mirrored from the primary datacenter to the DR site 800km (497mi) away. Which of the following replication methods should the administrator consider FIRST?

Shipped tapes are a disaster recovery method for large data sets but do not provide real-time mirroring and have a very high Recovery Point Objective (RPO) and Recovery Time Objective (RTO).

Asynchronous replication is ideal for long distances because it acknowledges write operations immediately to the host without waiting for confirmation from the remote site. This approach tolerates high latency and ensures primary site performance isn't severely degraded by the network delay over 800km.

Snapshots capture a point-in-time copy of data but are not a continuous replication method suitable for mirroring active data to a DR site.

Synchronous replication requires write operations to be committed to both primary and secondary sites before acknowledging success, which introduces significant latency and performance degradation over long distances like 800km.