Which switching method checks the CRC checksum as the frame is received by the switch?

Store-and-forward mode is the default mode for mode edge switching equipment. Store-and-forward receives the frame, calculates the CRC, and then makes a forwarding decision. Cut-through mode allows the switch to make a forward/filter decision immediately after the destination MAC address is received. Frag-free mode inspects the first 64 bytes of an incoming frame, before a forward/filter decision is made. Fast switching is a method in which a caching table is created for MAC addresses received so that switching can be made faster.