A vCloud vApp differs from a vSphere vApp in the way it is instantiated and consumed in the vCloud. A vApp is a container for a distributed software solution and is the standard unit of deployment in vCloud Director. It allows power on and off operations to be defined and ordered, consists of one or more virtual machines, and can be imported or exported as an OVF package. A vCloud vApp can have additional vCloud-specific constructs such as networks and security definitions.