Which of the following will allow secure remote login on a managed device?

Telnet is an unsecured remote login protocol that transmits all data, including usernames and passwords, in clear text, making it vulnerable to eavesdropping.

CLI (Command Line Interface) is a method of interacting with a device, not a secure remote access protocol itself; it can be accessed insecurely (Telnet) or securely (SSH).

Secure Shell (SSH) is a cryptographic network protocol that enables secure remote command-line access and other network services over an unsecured network. SSH encrypts all data transmitted between the client and the server, including login credentials, thereby preventing eavesdropping, connection hijacking, and other attacks. This makes it the standard for secure remote management of network devices and servers.

HTTP (Hypertext Transfer Protocol) is primarily used for web browsing and is not designed for secure remote command-line login; it is unencrypted and not a suitable protocol for this purpose.