Which statement accurately describes why it is a best practice to pre-populate the MAC
addresses of non-802.1X-capable Cisco IP phones into an endpoint database?

A.
If the MAC address is not found in an endpoint database, any PC tethered to the Cisco IP
phone will be allowed to access the network unauthenticated.

B.
If the MAC address is not found in an endpoint database, authentication will fail for the
Cisco IP phone and the Catalyst switch port will be set to err-disable. Neither the PC host
nor the phone will be able to communicate on the network.

C.
If the MAC address is not found in an endpoint database, it will take 3 MAB timeouts (90
seconds) before the MAC address of the Cisco IP phone is automatically entered in the
database. No calls can be made in the interim.

D.
If the MAC address is not found in an endpoint database, authentication will fail for the
Cisco IP phone and the tethered PC port on the phone will be set to err-disable. The PC will
not be able to communicate on the network.