Cloud resources are an abstraction of their underlying vSphere resources and provide the compute and memory resources for vCloud Director virtual machines and vApps, and access to storage and network connectivity.
Cloud resources include provider and organization virtual datacenters, external networks, organization virtual datacenter networks, and network pools. Before you can add cloud resources to vCloud Director, you must add vSphere resources.
For more information about organization virtual datacenters, see Allocate Resources to an Organization.
For more information about organization virtual datacenter networks, see Managing Organization Virtual Datacenter Networks