EdgeSolutions anticipates growth to thousands of spokes. Their current single hub VNet design uses peering for spoke connectivity but they are approaching the subscription peer limits. What is the recommended scalable alternative to support tens of thousands of spokes while preserving transitive routing and centralized security?

The correct answer addresses the scalability limitations of a single hub VNet with peering. Azure Virtual WAN (vWAN) is designed for large-scale network architectures, supporting thousands of spokes by allowing multiple secured virtual hubs across regions. This approach provides transitive routing and centralized security policies, overcoming the peering limits of a single VNet. Requesting a quota increase is a temporary solution and doesn't address the fundamental architectural limitations for tens of thousands of spokes. Converting to site-to-site VPNs would introduce significant management overhead and potential performance bottlenecks compared to vWAN. Azure Front Door is a global, scalable entry point for web applications and doesn't provide the network connectivity or transitive routing capabilities required for spoke-to-spoke or spoke-to-hub communication within a private network architecture.