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200-301 · Question #964

What is a function of store-and forward switching?

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).

Submitted by wei.xz· Mar 5, 2026Network Fundamentals

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

How the community answered

(44 responses)
  • A
    2% (1)
  • B
    93% (41)
  • D
    5% (2)

Why each option

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).

AIt reduces latency by eliminating error checking within the frame

Store-and-forward switching increases latency because it must receive the entire frame and perform error checking before forwarding.

BIt produces an effective level of error-free network traffic using CRCs.Correct

Store-and-forward switching buffers the entire Ethernet frame and calculates the Cyclic Redundancy Check (CRC) in the Frame Check Sequence (FCS) field. It compares this calculated CRC to the one received in the frame; if they do not match, the frame is dropped, ensuring only error-free frames are forwarded.

CIt buffers frames and forwards regardless of errors within the frames.

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.

DIt forwards a frame by checking only the destination MAC address

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

Source: https://www.cisco.com/c/en/us/support/docs/switches/catalyst-6500-series-switches/10570-41.html

Topics

#Store-and-forward switching#Layer 2 switching#CRC error checking

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