Which AAA commands configure console login to authenticate over the network via RADIUS?
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Correct answer: aaa new-model aaa authentication login console group radius.
Why this is the answer
The command aaa new-model aaa authentication login console group radius is correct because it enables AAA globally with aaa new-model, then specifies that login attempts on the console line (login console) should be authenticated using a group of servers (group) defined as RADIUS. This directs the router to send authentication requests to the configured RADIUS server(s) for console access. aaa authentication login console local would authenticate against the local username database, not RADIUS. aaa authentication login default enable would authenticate against the enable password, which is not RADIUS. aaa authentication enable default configures authentication for enable mode, not console login.
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