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

A.If the radius server returns an error， the enable password will be used
B.If the radius server returns a ’failed’ message， the enable password will be used
C.The command login authentication group will associate the AM authentication to a specifiedinterface
D.If the group database is unavailable， the radius server will be used