By itself, what does the command aaa new-model enable?
A.
It globally enables AAA on the switch, with default lists applied to the VTYs.
B.
Nothing; you must also specify which protocol (RADIUS or TACACS) will be used for AAA.
C.
It enables AAA on all dot1x ports.
D.
Nothing; you must also specify where (console, TTY, VTY, dot1x) AAA is being applied.
Explanation:
aaa new-model enable the AAA access control model. Access control is the way you control who
is allowed access to the network server and what services they are allowed to use once they have
access. Authentication, authorization, and accounting (AAA) network security services provide the
primary framework through which you set up access control on your router or access server.
Reference:
http://www.cisco.com/en/US/docs/ios/12_2/security/configuration/guide/scfaaa.html