NetDiag

NetDiag is a command-line, diagnostic tool included with the Support Tools on the Windows 2000 Setup CD that helps isolate networking and connectivity problems by performing a series of tests to determine the state of your network client. NetDiag diagnoses network problems by checking all aspects of a host computer's network configuration and connections. Beyond troubleshooting TCP/IP issues, it also examines a host computer's Internetwork Packet Exchange (IPX) and NetWare configurations.