Which statement describes asynchronous data replication?

Which statement describes asynchronous data replication?

• A. It mirrors data with parity to reduce RPO to near zero.
• B. It writes to a single site only.
• C. It lags behind real-time copies, resulting in a higher RPO but often lower write latency.
• D. It provides no latency benefits and increases RPO.

Answer: (C)

Asynchronous data replication means the primary system writes first and then sends changes to the remote site afterward, so there’s a delay between when data is written locally and when it appears remotely. That delay causes the replica to lag behind real-time copies, which means the recovery point objective can be higher—you could lose more data if a failure occurs after the last local write but before the remote copy catches up. At the same time, the primary benefits from lower write latency because it doesn’t wait for the remote acknowledgment. This trade-off—lagging copies with a higher RPO but faster local writes—is exactly what the statement describes.

Asynchronous data replication means the primary system writes first and then sends changes to the remote site afterward, so there’s a delay between when data is written locally and when it appears remotely. That delay causes the replica to lag behind real-time copies, which means the recovery point objective can be higher—you could lose more data if a failure occurs after the last local write but before the remote copy catches up. At the same time, the primary benefits from lower write latency because it doesn’t wait for the remote acknowledgment. This trade-off—lagging copies with a higher RPO but faster local writes—is exactly what the statement describes.