This driver suppport a range of ethernet adapters based on a chipset produce by ADMtek. Just about all adapters that provide 10/100BaseT are based on this chipset.
In addition to selecting this option to either be compiled into the kernel or to be build as a module, you need to configure the appropriate networking interfaces. The device will appear as another ethernet device, and can be checked using entries like cat /proc/net/dev or tools like ifconfig.
For further information on networking, I suggest that you refer to the many excellent Linux networking documents, including the Linux Network Administrators' Guide and the Linux Network HOWTO.