network booting

I have a laptop that will not boot from CD, see:
The other option available for reinstalling booting is via the Realtek RTL8139 card.
Can you tell me how to use this?
I can get into the configuration menu by pressing Shift-F10 during start-up.
It has the following options:

Network Boot Protocol      RPL or PXE
Boot Order                        Int 18h or Int 19h or PnP/BEV(BBS) or ROM Disable

What do these mean?
How do I know if the network is running and then point it to a setup file?

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Brian PiercePhotographerCommented:
The boot from network option is most commonly used in a windows envionment to use PXE to boot to a server which has been set up with RIS (Remote Installation Services) or id newer replacement WDS, Windows deployment serviices. These are not trivial to set up see

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This is a good guide - but you need a couple of files from a Windows 2003 Server CD:
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