Which port is associated with non-encrypted communication for logging into devices remotely?

The correct choice is associated with Telnet, which operates on port 23. Telnet is a protocol used for remote login and command execution over a network. It provides a way for users to access network devices such as routers, switches, and servers. However, it does not use encryption for the data being transmitted, which means that communication is sent in plaintext. This lack of encryption makes Telnet vulnerable to eavesdropping and other security risks.

In contrast, other ports mentioned serve different purposes. Port 22 is designated for SSH (Secure Shell), which provides encrypted communication for remote logins, making it more secure than Telnet. Port 25 is primarily used for SMTP (Simple Mail Transfer Protocol), which is used for sending emails. Port 80 is the standard port for HTTP (Hypertext Transfer Protocol), used for web traffic. Therefore, port 23 is specifically recognized for non-encrypted communication for logging into devices remotely, highlighting its association with Telnet.