Refer to the exhibit. Host A switch interface is configured in VLAN 2. Host D sends a unicast packet destined for the IP address of host A. What does the switch do when it receives the frame from host

A broadcast storm is typically caused by Layer 2 loops or excessive broadcast traffic, not by the normal forwarding of an unknown unicast frame.

The switch does not drop the frame from its MAC table due to an unknown unicast; instead, it floods the frame in an attempt to learn the destination's location.

Shutting down a port and placing it in err-disable mode is a security measure or error response, not the standard behavior for handling an unknown unicast frame.

If the switch's MAC address table does not contain an entry for Host A's destination MAC address, it classifies the frame as an unknown unicast. In this scenario, the switch floods the frame out of all active ports within VLAN 2, excluding the port from which it received the frame from Host D, to find the destination and learn its MAC address.