Network Connectivity is Google's suite of products that provide enterprise connectivity from your on-premises network or from another cloud provider to your Virtual Private Cloud (VPC) network.
Connect to Google Cloud
Securely extends your peer network to Google's network through an IPsec VPN tunnel.
Extends your on-premises network to Google's network through a highly available, low latency connection. You can use Dedicated Interconnect to connect directly to Google, or use Partner Interconnect to connect to Google through a supported service provider.
Uses the Border Gateway Protocol (BGP) to dynamically exchange routes between your VPC network and peer networks when you use Cloud VPN or Cloud Interconnect.
Network Connectivity Center
Network Connectivity Center lets you use a hub-and-spoke architecture for network connectivity management. With this architecture, you can conduct data transfer between your sites. Network Connectivity Center also includes the Router appliance feature, which lets you use a third-party network virtual appliance to establish site-to-site or site-to-cloud connectivity.