How do switches forward frames only to the destination computer?

Switches make forward/filter decisions based on the MAC address to port association in the MAC address table. Forward/filter decisions are layer 2 switching decisions and not layer 3 routing decisions; therefore, the routing table is irrelevant. A frame is only flooded to all active ports on a switch under two conditions; the destination MAC address is unknown or the MAC address table is full. Broadcasting for the MAC address is not a function of switching and is, therefore, an incorrect answer.