CompTIA Cloud+ Practice Test

What type of data replication allows for immediate updates to master data while later updating remote zones?

1. Synchronous

2. Asynchronous

3. Volume sync

4. Mirroring

The correct answer is: Asynchronous

Asynchronous data replication is characterized by the ability to update master data immediately while allowing for later updates to remote zones. In this model, changes made to the primary or master data are recorded and sent to secondary sites without the need for immediate synchronization. This means that the primary site can continue to operate and process transactions without waiting for the secondary sites to confirm that they have received and applied those updates. By implementing this method, organizations can improve performance and reduce latency since the main operations can proceed without being stalled by the replication process. The data on the remote zones is eventually updated, which is ideal for scenarios where real-time consistency is not critical across all storage locations. This can be particularly useful in distributed cloud environments where geographic distance and network latency might hinder real-time sync operations. In contrast, synchronous replication requires that both the primary and secondary data must remain consistent at the same time, thus it can introduce delays and reduce performance. The other options, such as volume sync and mirroring, also pertain to methods of data replication but do not describe the specific characteristic of immediate updates with delayed remote updates as effectively as asynchronous replication does.