You have 10 single-region project VPCs that must share a Partner Interconnect to on-prem and use the same third-party inspection appliances for all inter-project, on-prem, and internet traffic. How should you architect this to optimize cost and operations?

The correct option leverages a hub-and-spoke architecture with a central hub VPC for shared services, including the Partner Interconnect and third-party inspection appliances. This consolidates the appliances and Interconnect, optimizing cost and operations. VPC Network Peering connects the spoke project VPCs to the hub, allowing traffic to flow through the shared appliances. Exporting and importing custom routes ensures proper traffic steering. The other options are less efficient: Configuring separate VLAN attachments per project on the appliances would increase complexity and potentially cost. Connecting each appliance interface to a separate VPC network for on-premises and internet connectivity, without a hub, would lead to redundant appliances and Interconnects. Consolidating all projects into a single VPC loses the isolation benefits of separate projects.