This is an ESXi hypervisor running on the bare metal server in the data center. There is no shared storage at all, only local storage that is used for virtual machines. This ESXi hypervisor is used to host all virtual infrastructure machines, such as the Active Directory Domain Controller (AD DC), the management station, the iSCSI server, and the virtual router. All virtual ESXi servers are running on top of the Master ESXi server.