CompTIA Cloud+ Practice Test

Which replication method is the best choice for a public cloud administrator needing to reduce WAN impact during production hours?

1. Asynchronous replication

2. Storage deduplication

3. Cold site failover with offsite archiving

4. Site mirroring

The correct answer is: Asynchronous replication

Asynchronous replication is the best choice for a public cloud administrator aiming to reduce WAN impact during production hours because it allows data to be copied to a secondary site without the need for the source and target systems to be in constant communication. In this method, data is sent over the WAN only after it has been written at the primary location, which minimizes the immediate bandwidth utilization and enables the system to continue operations without significant interruption. This approach is particularly beneficial during high-traffic production hours, as it mitigates latency and ensures that primary operations are prioritized without the burden of real-time data replication. Since data is replicated at regular intervals, the overall effect on the network can be controlled, allowing administrators to schedule transfers during off-peak hours or utilize bandwidth throttling features to optimize usage further. Other options, such as storage deduplication, cold site failover, and site mirroring, either do not address the WAN traffic directly or could introduce additional complexities or performance issues during active production times. Storage deduplication primarily focuses on reducing the amount of data that needs to be stored rather than the impact on WAN during replication. Cold site failover with offsite archiving involves taking data offline, which may not provide immediate data recovery options, and site mirroring