VPC Network Peering 

Cloud VPC Network Peering lets you privately connect two VPC networks, which can reduce latency, cost, and increase security.

Shared VPC 

Shared VPC lets you share subnets with other projects. You can then create resources (like VM instances) on those subnets

Packet Mirroring

Packet Mirroring aims to provide functionality in cloud, which can mirror a customers regular traffic and fulfill customers need for Advanced Security and Application Performance Monitoring.