How to activate PXE-LAN Boot on a ZBOX Mini PC ?

In Legacy OS mode, PXE-LAN Boot is done by enabling PXE LAN Boot option in CMOS Setup, then selecting the PXE-LAN Boot Agency as First Priority Boot Device. In UEFI OS mode, PXE-LAN Boot is done by enabling Network Stack, then selecting the PXE-LAN Boot Agency as First Priority Boot Device.