Network Info is a small program of just half a mega, that shows you all the information relevant to all the network adapters that are connected to your PC: this includes modems, DSL, LANs, etc.
The control and workings of the Network Info program are very intuitive. Among the data show are, for example, the IP address, the MAC address, the subnetwork mask or the DHCP server address. Also, you can minimize the program to the system tray so it doesn´t bother you while you work.