AWS Certified Advanced Networking Specialty Practice Exam

The primary benefit of using multiple availability zones in a Virtual Private Cloud (VPC) architecture is enhanced disaster recovery and availability. By deploying resources across multiple availability zones, you ensure that your applications are more resilient to failures. Each availability zone operates independently, with its own power, cooling, and physical security, which means that if one zone experiences an issue, the resources in the other zones can continue to function, minimizing downtime and maintaining service availability.

Additionally, this architecture supports a better disaster recovery strategy. In the event of a localized disaster affecting one zone, having applications and data distributed across multiple zones allows for quicker recovery and continuity of operations. This strategy is especially critical for mission-critical applications where uptime is essential.

Reducing costs, ensuring data compliance, and improving performance for single-instance applications, while valuable aspects, do not capture the primary benefit provided by multiple availability zones. These considerations can come into play depending on specific use cases, but they do not address the core advantage of using multiple availability zones for resilience and uptime.