Final answer:
The store-and-forward method results in the fewest errors for switch forwarding as it checks the entire Ethernet frame for errors before forwarding.
Step-by-step explanation:
The forwarding method used by a switch that results in the fewest errors is store-and-forward. This method involves the switch buffering and verifying the entire Ethernet frame for errors before forwarding it on to the destination. If any errors are detected, the frame is not forwarded. Fragment free is a variation that waits for the first 64 bytes to ensure no collision, but does not offer as much error checking as store-and-forward. Cut through switches begin forwarding the frame as soon as the destination address is identified, leading to the potential forwarding of erroneous frames. Token based is not a forwarding method; it is actually a network access control method used in token ring networks.