Telnet uses TCP (Transmission Control Protocol). According to the reference, a TELNET connection is a TCP connection designed for transmitting data along with TELNET control information.
TCP vs UDP: A Brief Overview
While Telnet specifically uses TCP, understanding the difference between TCP and UDP is crucial.
| Feature | TCP | UDP |
|---|---|---|
| Connection | Connection-oriented | Connectionless |
| Reliability | Reliable (guaranteed delivery) | Unreliable (no guaranteed delivery) |
| Ordering | Ordered delivery | Unordered delivery |
| Use Cases | Web browsing, email, file transfer | Streaming, online gaming, DNS |
Telnet and TCP: Why TCP?
Telnet requires a reliable connection because it involves sending commands and receiving responses. The correct order and guaranteed delivery of data are essential for proper functionality. TCP ensures this reliability.
- Reliability: TCP confirms that data packets reach their destination in the correct sequence, crucial for command execution in Telnet.
- Connection-Oriented: A TCP connection establishes a dedicated channel between the client and server, ensuring smooth communication.
In summary:
Telnet relies on the robust and reliable connection provided by TCP for transmitting commands and data.
