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And now -- the answers!
1, 2, 3: By default, Cisco port security will assign one secure MAC address for each port-security enabled port.
The default security mode is shutdown, and when shutdown closes a port, the port will go into err-disabled state.
That means that once you clear up the issue that caused the port to be closed down, you have to manually close and re-open the port. You don't have to reload the switch, but the port won't reset on its own.
4. "B". If you enable port security on a port and don't assign a static secure MAC address, the next source MAC address that switch sees on an incoming frame will be the secure address.
See you Saturday with another all-new practice exam!