You need centralized network control for three developer teams (Web, App, Database) while minimizing operational overhead. Which topology should you use?
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Correct answer: Configure a host project with a Shared VPC. Create service projects for Web, App, and Database..
Why this is the answer
Shared VPC allows you to centralize network administration in a host project while enabling resources from multiple service projects (Web, App, Database) to use that shared network. This design minimizes operational overhead by consolidating network management, IP address allocation, and firewall rules. The other options increase operational overhead: Separate VPCs with HA VPN create complex routing and management for each connection. Three Shared VPC host projects defeat the purpose of centralized network control and increase administrative burden. Separate VPCs with VPC Network Peering in a full mesh also lead to complex routing, firewall rules, and management as the number of VPCs grows.
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