Which switching method stores the entire frame in memory and checks the frame for errors?

• A. Cut-through
• B. Store and Forward
• C. Fragment-Free
• D. Forward Filter Decision

Answer: (B)

In switching, the way a device handles a received frame matters for both reliability and latency. The method that stores the entire frame in memory and then checks it for errors is designed to verify data integrity before forwarding. It reads the full frame, performs the Frame Check Sequence (FCS) validation, and only if the frame is error-free does it forward it to the destination. This approach prevents corrupted frames from propagating through the network, which improves overall reliability, though it adds some delay due to buffering.

Cut-through, by contrast, forwards the frame as soon as the destination address is read, which minimizes latency but can forward frames with errors. Fragment-free waits for the first 64 bytes to pass to guard against certain runt frames, but it does not store and check the entire frame. The others are not standard terms for this behavior, so they don’t describe storing the full frame and validating it before forwarding.