The Transmission Control Protocol (TCP) is a fundamental communication protocol used on the internet. It ensures that data sent from one computer to another arrives accurately and in the correct order. TCP breaks down large messages into smaller packets, which are then transmitted separately. Once all packets reach their destination, TCP reassembles them, making sure nothing is lost or out of sequence. TCP works alongside the Internet Protocol (IP), forming the backbone of internet communication. While IP handles the addressing and routing of packets, TCP manages the reliability and flow of data. This combination allows applications like web browsing and email to function smoothly, providing a seamless experience for users.