An enterprise is designing a hybrid network architecture to connect its on-premises data center to Google Cloud Virtual Private Cloud (VPC) networks. The organization has identified the following requirements and operational constraints: The expected steady-state throughput is 500 Mbps, with future growth capped below 2 Gbps. The enterprise does not maintain a presence in a Google Cloud colocation facility (point of presence). The enterprise wants private RFC 1918 connectivity backed by an SLA without the overhead of provisioning and managing physical cross-connects or optical routing hardware. Which connectivity solution should the enterprise choose?

Partner Interconnect: ### What Partner Interconnect is **Partner Interconnect** provides private, enterprise-grade Layer 3 or Layer 2 connectivity between an on-premises network and Google Cloud Virtual Private Cloud (VPC) through a supported service provider. It allows organizations whose networks do not physically meet Google's network at a colocation facility to bridge the gap using the service provider's network. ### How it meets the requirements - **Sub-10 Gbps Bandwidth**: Partner Interconnect supports flexible capacity options ranging from 50 Mbps up to 50 Gbps per attachment, making it cost-effective for a 500 Mbps workload scaling to 2 Gbps. - **No Colocation Presence**: Organizations connect their router to an authorized service provider, who already has physical circuits in Google's points of presence (PoPs), removing the need for colocation space. - **Private SLA-Backed Connectivity**: It establishes private RFC 1918 routing via VLAN attachments and **Cloud Router** with enterprise SLAs (99.9% or 99.99%) without requiring customer-managed physical cross-connects. ### Key advantages - Offers granular, fractional bandwidth capacities below 10 Gbps. - Eliminates the need to lease space or procure direct optical hardware (10G/100G) at Google colocation facilities. - Enables faster provisioning through provider pairing keys. - Facilitates enterprise hybrid integration with managed Layer 2 or Layer 3 connectivity. ### Why this is optimal Partner Interconnect satisfies both the physical constraint (absence from Google colocation facilities) and the bandwidth requirement (sub-10 Gbps) far more economically and operationally efficiently than Dedicated Interconnect.