Choosing a network connection option
Different applications and workloads require different network connectivity solutions. Google supports multiple ways to connect your infrastructure to Google Cloud Platform.
If you would like to extend your data center network into their Google Cloud projects, Dedicated Interconnect offers enterprise-grade connections to GCP. This solution allows you to directly connect your on-premises network to your GCP VPC. You must meet Google at one of their peering locations. It is useful to connect to your VPC, and in hybrid environments, to extend your corporate data center’s IP space into the Google cloud, or for high-bandwidth traffic (greater than 2Gbps), for example when transferring large data sets. Dedicated Interconnect can be configured to offer a 99.9% or a 99.99% uptime SLA.
Google Cloud VPN securely connects your on-premises network to your GCP Virtual Private Cloud (VPC) network through an IPsec VPN connection. Traffic traveling between the two networks is encrypted by one VPN gateway, then decrypted by the other VPN gateway. This protects your data as it travels over the Internet.
If you require access to Google and Google Cloud properties and can satisfy Google’s peering requirements, Direct Peering is the solution. Direct peering does not have an SLA.
If you require access to Google public infrastructure and cannot satisfy Google’s peering requirements, you can connect via a Carrier Peering partner. Carrier Peering does not have an SLA.