The SSH (Secure Shell) connection is significantly more secure than Telnet.

telnet

It was one of the first network protocols used to connect to devices over the network in a remote terminal session. Telnet's main weakness is that it transmits all information, including login credentials and any other data sent during the session, in plain text.

This means that anyone with the ability to intercept network traffic can easily read this information, posing a significant security risk.

SSH

It was designed and built with safety in mind. SSH provides encrypted communication between the client and the server, meaning that all information transmitted during the session, including login credentials, is protected from interception by third parties.

Additionally, SSH includes more robust authentication methods, such as key-based authentication, which offers an additional layer of security compared to Telnet's password-based authentication.

Because of these significant differences in security, SSH has largely replaced Telnet for secure remote management of devices and servers in production environments.

In current practice, the use of Telnet is strongly discouraged for any purpose that requires the transmission of sensitive information or access credentials.