ESXi installed on a host can be one of these types:
To determine the type of ESXi installation:
Connect to the host via SSH.
Run this command:
# esxcfg-info -e
You see an output similar to:
boot type: visor-thin
You can determine the ESXi type based on the output of this command.
visor-thin indicates an installable deployment
visor-usb indicates an embedded deployment
visor-pxe indicates a PXE deployment
For more information read the following article from VMware