Do you mean TCP/IP or TCP/IP?
TCP/IP actually has come to have two separate meanings. It can mean the "TCP/IP Protocol Suite" which is sort of everything between sockets and ethernet, or it can mean TCP over IP (Transmission Control Protocol over Internet Protocol), which is the connection oriented communication protocol. Sometimes it is confusing and most people use TCP/IP to mean TCP over IP and just UDP (Unreliable Datagram Protocol) to mean UPD over IP. You can also use IP without TCP or UDP for communications (raw sockets).