TCP/IP is a data link protocol used on the internet to let computers and other devices send and receive data.
TCP/IP stands for Transmission Control Protocol/Internet Protocol and makes it possible for devices connected to the internet to communicate with one another across networks.
The most important features can be summarized as follows: TCP is connection-oriented and enables two-way communication between two endpoints after the three-way handshake.
TCP is reliable because the protocol ensures that all data is fully transmitted and can be assembled by the receiver in the correct order.