After a week of reading many posts about problems with the new Optiplex 755 and the new Intel 82566 DM-2 network cards I have finally found a solution. I have verified that using this driver that the network card works in both Windows Deployment Server and Altiris Deployment Server. I have not tested BartPE.
I am using WinPE 2.1 vista build boot.wim, therefore, the driver that I loaded was the Vista32 e1e6032.inf file.