In what cases is the TCP protocol used?

The TCP (Transmission Control Protocol) is used in cases where reliable, ordered, and error-free data transfer between two network nodes is important. It ensures connection establishment, delivery control, retransmission of lost packets, and flow control.

Typical uses of TCP:

• Web servers and browsers (HTTP/HTTPS) — for reliable page loading.
• Email (SMTP, IMAP, POP3).
• File transfer (FTP).
• Applications where data integrity is crucial, such as databases, remote access (SSH).

TCP is suitable when reliability is more important than speed or minimal latency, unlike UDP, which is used for streaming video, gaming, and other applications where some packet loss is acceptable.