CCNA: Cisco Certified Network Associate — Question 1191

What is a function of store-and forward switching?

Answer options

• A. It reduces latency by eliminating error checking within the frame
• B. It produces an effective level of error-free network traffic using CRCs.
• C. It buffers frames and forwards regardless of errors within the frames.
• D. It forwards a frame by checking only the destination MAC address

Correct answer: B

Explanation

The correct answer is B because store-and-forward switching uses Cyclic Redundancy Checks (CRCs) to ensure the integrity of the data before forwarding it, thus maintaining error-free traffic. Option A is incorrect as it implies that error checking is eliminated, which is not true for this method. Option C is misleading since store-and-forward does check for errors before forwarding, and option D is incorrect as it oversimplifies the process, which involves more than just checking the destination MAC address.