Advantech RUGGED PENTIUM IPPC-9120 - Manual (Page 60)

Chapter 4 PCI Bus Ethernet Interface 45
6. a. Choose "Realtek RTL8139(A/B/C/8130)PCI Fast Ethernet"
b. Press "OK"
7. a. Press "Add..." to select suitable services or protocol
b. Press "OK" to finish network configuration
8. Press "Yes" to reboot your system