Store-and-forward switch
The layer 2 switch accepts a frame on an input line, buffers it briefly, and then routes it to the appropriate output line.
Cut-through switch
The layer 2 switch takes benefit of the fact that the destination address appears at the starting of the MAC (medium access control) frame. The layer 2 switch starts repeating the incoming frame onto the appropriate output line as soon as the layer 2 switch recognizes the destination address.