单选题Which Cisco IOS command globally enables port-based authentication on a switch？ （）Aaaa port-auth enableBradius port-control enableCdot1x system-auth-controlDswitchport aaa-control enable
单选题
Which Cisco IOS command globally enables port-based authentication on a switch？ （）
A
aaa port-auth enable
B
radius port-control enable
C
dot1x system-auth-control
D
switchport aaa-control enable
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