Dell OptiPlex 755 - Manual (Page 48)

5. Select TCP/IP. Press <Enter>.
The following messages appear:
l Disable Network Interface: (Y/N)
Press <n>.
If the network is disabled, then all remote AMT capabilities are disabled and TCP/IP settings are not necessary. This option is a toggle, and the next time
it is accessed you are prompted with the opposite setting.
l [DHCP Enable] Disable DHCP (Y/N)
Press <n>.