Which switching method drops frames that fail the FCS check?

Store-and-forward switching is the method that drops frames that fail the Frame Check Sequence (FCS) check. In this switching technique, the switch receives the entire frame before it begins the process of forwarding it to the appropriate destination. During this process, the switch checks the frame for any errors, specifically looking at the FCS, which is a form of error checking that ensures the integrity of the transmitted data. If the FCS check indicates that the frame is corrupted or has errors, the switch will discard the frame rather than forwarding it, ensuring that only error-free frames are transmitted within the network. This enhances overall network reliability by preventing faulty data from propagating through the network.

In contrast, other switching methods such as cut-through and fragment-free switching do not perform a complete error check before forwarding frames. Cut-through switching starts forwarding the frame as soon as it reads the destination address, which means that it can send frames that might contain errors. Fragment-free switching, which is a slight variation on the cut-through method, checks the first 64 bytes of the frame to determine if it is likely to be valid, but this approach can still allow some erroneous frames to pass through if the errors occur beyond the initial fragment. Fast forwarding switching aims for low