Key terminology relating to virtual software is as follows:
A virtual computer is the software that insulates the application stack from the physical hardware.
Intel Virtualization Technology
Also known as Intel-VT. When enabled in the BIOS it allows the CPU to support multiple operating systems including 64-bit architecture. On many Intel processors this setting may be disabled in the BIOS and must be enabled prior to installing Symantec Messaging Gateway 10.5.
AMD processors that support 64-bit architecture usually have this setting enabled by default.
Host computer OS
The host computer or operating system (OS) is the physical hardware and primary OS upon which the guest computer/OS run.
Guest computer OS
The OS installed on the virtual computer. Symantec Messaging Gateway Virtual Edition is the guest computer and OS.
VMware ESX Server
VMware ESX Server is an enterprise-quality virtual machine platform.
VMware ESXi Server
VMware ESXi is an enterprise-quality virtual machine platform similar to ESX but with a smaller code base.
Microsoft Hyper-V Server
A native hypervisor distributed by Microsoft that enables platform virtualization on x86-64 systems.
Virtual computer Image
A set of files in a VMware-specific format that contains an image of a preconfigured virtual computer and Symantec Messaging Gateway Virtual Edition. This image can be used to install a virtual computer on a host computer that runs the VMware ESX Server or VMware ESXi Server.
ISO image or OS restore CD
An image that lets you install Symantec Messaging Gateway onto a computer that runs VMware ESX Server or ESXi Server.
A virtual machine that includes a set of software. For example, an OVF template can include the Symantec Messaging Gateway software.
A virtual machine for Microsoft Hyper-V that includes a set of software.
Symantec Messaging Gateway software is not available as a VHD template.
A desktop virtual machine platform that connects to a VMware ESX Server or VMware ESXi server.
Microsoft Management Consoles
Extended console that is installed onto a Windows 7 PC or Windows 2008 Server (32- or 64-bit) or System Center Virtual Machine from which an administrator can manage a Hyper-V server.