What is an advantage of store-and-forward switching over cut-through switching?

• A. Lower latency
• B. No buffering required
• C. Frame error checking
• D. Works only with IPv4 frames

Answer: (C)

Error detection at the switch is the concept being tested. In store-and-forward switching, the switch buffers the entire frame and checks its Frame Check Sequence (CRC) before forwarding. If the frame is corrupt, it is dropped; only error‑free frames are sent onward. This capability to verify and ensure frame integrity is the key advantage over cut-through switching, which forwards frames as soon as header information is read and may propagate corrupted frames because it doesn’t delay for CRC verification. Lower latency is not an advantage here—cut-through provides that—and store-and-forward does require buffering. The frame error checking applies to any data-link frame, not just IPv4.