Which service is designed to ensure availability and redundancy by being spread across multiple locations?

The choice of a geographically dispersed service is correct because this approach inherently involves distributing applications and resources across multiple physical locations or data centers. By doing so, it ensures high availability and redundancy. If one location experiences an outage or failure, services can continue to operate from another location, minimizing downtime and enhancing resilience. This distribution strategy is essential for maintaining service continuity and fulfilling service-level agreements (SLAs) regarding uptime.

While legacy applications and network configurations are important in their own right, they do not specifically focus on or provide the inherent design to support availability and redundancy across different physical locations in the same way that a geographically dispersed service does. A web farm can improve availability and load balancing, but it typically operates within a single geographical location, rather than across multiple locations, thus lacking the same level of redundancy and geographic failover benefits.