You are the Cisco Configuration Assistant in your company.When you enter the
switch(config)£aaa authentication dotlx default group radius command on a Cisco Catalyst switch,
You get the error message “invalid input detected”, What is the most likely reason?

A.
Enable 802.lx.first

B.
Define the RADIUS server IP address first, using the switch(config)# radius-server host ipaddress command.

C.
Method-list name is missing

D.
Enter the aaa new-model command first,