CompTIA Cloud+ Practice Test

Which type of replication involves immediate writing to the primary location followed by scheduled updates to the remote location?

1. Synchronous

2. Asynchronous

3. Volume sync

4. Mirroring

The correct answer is: Asynchronous

The concept of asynchronous replication involves a process where data is first written to the primary storage location and then later updated to a remote storage location. This means that there is a slight delay in the replication, which allows for quicker write operations at the primary site since it does not have to wait for the data to be confirmed as written to the remote site. In this setup, data integrity is maintained at the primary location immediately, while the updates to the remote site occur based on a scheduled frequency. This is particularly beneficial in scenarios where immediate disaster recovery is less critical, or where network bandwidth may be limited. Users can benefit from lower latency during write operations because the system does not need to pause for confirmation from the remote site before proceeding. In contrast, synchronous replication would require the data to be simultaneously written to both the primary and remote locations, which can introduce latency due to the waiting for acknowledgment from the remote site. Volume sync and mirroring typically describe processes that do not capture the characteristic of delayed updates to a secondary site following an immediate write. Thus, asynchronous replication is the most accurate description of the method whereby data is immediately written at the primary location with subsequent updates to the remote location.