单项选择题
You want the text "Unauthorized access prohibited!" to be displayed before the login prompt every time someone tries to initiate a Telnet session to a router, as shown in the example below:
Which command can be used to configure this message?()
A. login banner x Unauthorized access prohibited! X
B. banner exec y Unauthorized access prohibited! Y
C. banner motd x Unauthorized access prohibited! X
D. vtv motd "Unauthorized access prohibited!"