A、A good security practice is to havethe none parameter configured as the final method used toensure that no other authentication method will be used

B、If a TACACS+ server is not available， then a user connecting via the console port would not beable to gain access since no other authentication method has been defined

C、If a TACACS+ server is not available， then the user Bob could be able to enter privileged modeas long as the proper enable password is entered

D、Theaaa new-model command forces the router to override every other authentication methodpreviously configured for the router lines

E、To increase security， group radius should be used instead of group tacacs+

F、Two authentication options are prescribed by the displayedaaa authentication command