VMware Certified Associate 6 - Data Center Virtualization Fundamentals Exam questions and answers: 1) A virtual disk is the primary unit of storage when virtualizing with Virtual Volumes. 2) NSX is the network virtualization platform used in VMware Software-Defined Data Centers. 3) Updating VMware Tools on a virtual machine can be done by configuring automatic checks and installs, or manually attaching the Tools ISO and updating.