You are setting up the network foundation for a new project. You need to create a custom-mode Virtual Private Cloud (VPC) network named 'prod-vpc' using the command line.

Which gcloud command should you use?

VPC networks are considered part of the Compute Engine networking infrastructure, so they are managed using the `gcloud compute networks` command group. To create a custom-mode VPC (where you manually define the subnets and IP ranges), you use the command `gcloud compute networks create [NETWORK_NAME] --subnet-mode=custom`. If you omit the flag or use `--subnet-mode=auto`, GCP will automatically create a subnet in every region.