A network term. It stands for Transmission Control Protocol.
It is important because it is one half of the network protocol used to control data on the Internet. The other half is IP.
The complete network protocol is called TCP/IP
TCP is responsible for checking that data has been delivered correctly from your computer (the client) to another computer (the server). If data is lost, then TCP requests that the data is re-sent.
See also IP in the glossary.
Challenge see if you can find out one extra fact on this topic that we haven't already told you
Click on this link: TCP