A cloud service provider provisioned four active/active data centers in various locations within the country at 50 miles between each data center. The data centers must provide redundant network…

In an active/active multi-data center design, providing application services from the closest data center to the customer improves user experience by reducing latency and optimizes traffic distribution.

Implementing active clusters in two data centers and backup in others implies an active/passive or active/standby model for some sites, which contradicts the 'four active/active data centers' requirement.

Asynchronous replication between only two data centers would not provide continuous availability across four active/active data centers, and the general principle of replicating to 'all backup' is more comprehensive.

Deploying database services in one data center and application layers in others can lead to increased latency between application and database tiers, impacting performance and potentially creating a single point of failure.

For active/active data centers to provide continuous availability and redundancy, application data must be replicated to all participating data centers, ensuring that any site can serve requests with up-to-date information and providing disaster recovery capabilities.