To ensure that the selected operating system is supported by ESXi before upgrading the guest operating system installed in a virtual machine, the administrator should take the following action:
B. Perform a guest OS and product search in the VMware Compatibility Guide.
The VMware Compatibility Guide is a comprehensive resource provided by VMware that allows users to check compatibility details for various guest operating systems, including their specific versions, with different versions of ESXi. By performing a search within the VMware Compatibility Guide based on the guest operating system and its version, the administrator can verify if the OS is officially supported and compatible with the version of ESXi they plan to use. This helps ensure a smooth and supported upgrade process for the guest operating system within the virtual machine.