Refer to the exhibit. Host A sent a data frame destined for host D. What does the switch do when it receives the frame from host A?

The switch drops frames destined for an unknown MAC address only if the destination is on the *same* port as the source; otherwise, it floods. The CAM table itself is not dropped.

Since Host D's MAC address is unknown to the switch's CAM table, the switch floods the frame out of all active ports, except for the port (Fa0/1) from which it received the frame, to locate the destination host.

Shutting down a port and placing it in err-disable mode is typically a response to security violations or errors, not a standard action for an unknown destination MAC address.

A broadcast storm occurs when excessive broadcast traffic loops within a network, which is not directly caused by a single unknown unicast frame being flooded.