AWS Certified Advanced Networking Specialty Practice Exam

How can you improve replication throughput in a multi-region application?

1. Increase the instance sizes in both regions

2. Reduce the frequency of replication

3. Use local disk storage instead of S3

4. None of the above

The correct answer is: None of the above

Improving replication throughput in a multi-region application typically requires strategies that enhance network efficiency, reduce latency, or optimize data transfer. The choice of "None of the above" suggests that the other options do not effectively achieve the goal of improving replication throughput. Increasing instance sizes (option A) may improve performance to some extent by providing more CPU and memory resources, but it is unlikely to have a significant impact on replication throughput, particularly if the bottleneck is related to network bandwidth or latency rather than instance capabilities. Throughput in a multi-region setup is more heavily influenced by the network connectivity and the replication method used rather than the size of the instances alone. Reducing the frequency of replication (option B) would actually decrease the volume of data transferred over time, which does not improve throughput; rather, it may lead to stale data across regions. Effective replication strategies may focus on increasing the frequency but optimizing the data sent, not reducing it. Using local disk storage instead of S3 (option C) typically does not improve replication throughput in a multi-region context. In fact, using a service like Amazon S3 can leverage the high durability and availability for distributed applications. Local disk storage may introduce other complexities, such as managing data consistency and availability across regions,