What is the function of the TCP protocol in the creation and operation of web applications?

TCP (Transmission Control Protocol) provides reliable data transfer between the client and server in web applications. Its main functions:

• Establishing a connection (handshake) before data transfer.
• Guaranteeing data delivery in the correct order without losses.
• Flow control and network congestion management.

For example, when a browser requests a page, TCP establishes a connection with the server, ensures the transmission of the HTTP request and the receipt of the response, guaranteeing that data is not lost and is received correctly.