200-301 · Question #964
200-301 Question #964: Real Exam Question with Answer & Explanation
The correct answer is B: It produces an effective level of error-free network traffic using CRCs.. Store-and-forward switching enhances network reliability by buffering entire frames and performing error checking before forwarding them. This method ensures that only valid, error-free frames are transmitted across the network, utilizing Cyclic Redundancy Checks (CRCs).
Question
What is a function of store-and forward switching?
Options
- AIt reduces latency by eliminating error checking within the frame
- BIt produces an effective level of error-free network traffic using CRCs.
- CIt buffers frames and forwards regardless of errors within the frames.
- DIt forwards a frame by checking only the destination MAC address
Explanation
Store-and-forward switching enhances network reliability by buffering entire frames and performing error checking before forwarding them. This method ensures that only valid, error-free frames are transmitted across the network, utilizing Cyclic Redundancy Checks (CRCs).
Common mistakes.
- A. Store-and-forward switching increases latency because it must receive the entire frame and perform error checking before forwarding.
- C. Store-and-forward switching buffers frames but specifically checks for errors (using CRC) and drops frames containing errors; it does not forward them regardless of errors.
- D. It forwards a frame by checking only the destination MAC address, which is characteristic of cut-through switching, not store-and-forward.
Concept tested. Store-and-forward switching operation and CRC
Reference. https://www.cisco.com/c/en/us/support/docs/switches/catalyst-6500-series-switches/10570-41.html
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