Refer to the exhibit. The exhibit shows a small switched network and the contents of the MAC address table of the switch. PC$1$ has sent a frame addressed to PC$3.$ What will the switch do with the frame?

The switch will forward the frame only to port $2.$

The switch will forward the frame to all ports.

The switch will forward the frame to all ports except port $4.$

The switch will discard the frame.

The switch will forward the frame only to ports $1$ and $3.$