- To know the TCP/IP configuration of a computer, open Command Prompt, and then type ipconfig. From the display of the ipconfig command, ensure that the network adapter for the TCP/IP configuration you are testing is not in a Media disconnected state.
- At the command prompt, ping the loopback address by typing ping 127.0.0.1.
- Ping the IP address of the computer. Ping the IP address of the default gateway.
If the ping command fails, verify that the default gateway IP address is correct and that the gateway (router) is operational.
- Ping the IP address of a remote host (a host that is on a different subnet).
- If the ping command fails, verify that the remote host IP address is correct, that the remote host is operational, and that all of the gateways (routers) between this computer and the remote host are operational.
- Ping the IP address of the DNS server.
If the ping command fails, verify that the DNS server IP address is correct, that the DNS server is operational, and that all of the gateways (routers) between this computer and the DNS server are operational.
- To open a command prompt, click Start, point to All Programs, point to Accessories, and then click Command Prompt.
- Transmission Control Protocol/Internet Protocol (TCP/IP) is the most popular network protocol, and the basis for the Internet. Its routing capabilities provide maximum flexibility in an enterprise-wide network. In Windows XP TCP/IP is automatically installed. On a TCP/IP network, you must provide IP addresses to clients. Clients may also require a naming service or a method for name resolution. This section explains IP addressing and name resolution for Network Connections on TCP/IP networks. It also describes the FTP and Telnet tools that are provided by TCP/IP.
- This article meant for Windows XP only.
Source: Microsoft help & support