多項選擇題

You need to configure port security on switch R1.
 Which two statements are true about this  technology? ()


A. Port security can be configured for ports supporting VoIP.
B. With port security configured, four MAC addresses are allowed by default.
C. The network administrator must manually enter the MAC address for each device in order for  the switch to allow connectivity.
D.  Withsecurity configured, only one MAC addresses is allowed by default.  
E. Port security cannot be configured for ports supporting VoIP.


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