When an interface status message states that the interface line status is administratively down and its protocol status is down, which of the following could be the cause of this status?
A) Nothing; the interface is working fine.
B) Port security has disabled the interface.
C) No cable, bad cable, wrong cable pinouts, or the speeds are mismatched on the two connected devices.
D) The interface is configured with the shutdown command.
D
Explanation: D) The interface is configured with the shutdown command because this is the status message that will be displayed when an interface has been disabled.
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