Console Login and Telnet

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http://www.unix.com – Hopefully my question makes sense, but I was wondering if the telnet service has anything to do with console logins or if they are completely unrelated. So for example, does the /etc/default/login file in UNIX have anything to do with Telnet? So if I want to verify that the root user can't login in to Telnet (assuming Telnet is enabled), would it just be a matter of looking for the CONSOLE=/dev/console? And if the telnet service is disabled, would the CONSOLE=/dev/console even matter? Thanks for any help you can provide! (HowTos)