CCNA Routing and Switching (legacy) — Question 23

Which switching method duplicates the first six bytes of a frame before making a switching decision?

Answer options

• A. fragment-free switching
• B. store-and-forward switching
• C. cut-through switching
• D. ASIC switching

Correct answer: C

Explanation

Cut-through switching is the method that reads the first six bytes of the frame header to make a forwarding decision quickly. In contrast, store-and-forward switching waits for the entire frame to be received before processing it, and fragment-free switching checks only the first 64 bytes. ASIC switching refers to a hardware implementation and does not specify a method of handling frame data.