TCP/IP stands for “Transmission Control Protocol / Internet Protocol” – TCP/IP is a set of protocols that allow Computers to Communicate with and Share Resources with other computers on a network. Some examples are FTP (File Transfer Protocol – to transfer files/folders etc),TelNet is used to login remotely to any other computer on a network.
Command to Reset TCP/IP in Windows XP and Windows Server 2003: netsh int ip reset c:\123.txt
(where 123.txt is any user-defined log file. In other words, you can give it any name you want.)
Command to Reset TCP/IP in Windows Vista: Use the same command as above, but you will have to Disable UAC first.
TechNation (India)-The Free KB 