If counted as a computer program, it's the most widely used program in the world. One of TCP's main functions is to prevent network congestion by regulating the rate at which computers send data.

The data is then transmitted over the physical layer of the network until the destination computer or ... These are the TCP and UDP (user datagram protocol) functions. Finally, the application ...

both of which are used by TCP/IP: Our portable freeware FixWin allows you to reset this and most other Windows settings or functions with a single click. Read: Troubleshoot TCP/IP connectivity ...