Which of the following does PXE use?
a) USB
b) DVD-ROM
c) CD-ROM
d) NIC

The answer is d) NIC.

Explanation:

PXE Stands for Preboot Execution Environment and a PXE uses an NIC also know as Network Interface Controller. For an example: If you have a DELL Inspiron 8500 and you couldn't get it to work you would need to go through all boot-up system including a Preboot Execution Environment in the booting code protocols it would say connecting to NIC after 6 seconds it would say NIC connected then it would search for a boot device after a few munities since the DELL Inspiron 8500 is obsolete you would get this message:

No Boot Device found

answer; always; never;