Can Telnet users log in to S series switches without entering the password when the authentication mode for the administrator domain is none

When the authentication mode for the administrator domain on an S series switch (except the S1700 switch) is set to none and the login authentication mode is set to AAA authentication in the user interface view, Telnet users cannot log in to the switch.
To enable Telnet users to log in to the switch without authentication, run the following command:
[HUAWEI] user-interface vty 0
[HUAWEI-ui-vty0] authentication-mode none

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