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What is the purpose of the FCS field in a frame?

  • to obtain the MAC address of the sending node
  • to verify the logical address of the sending node
  • to compute the CRC header for the data field
  • to determine if errors occurred in the transmission and reception
Answers Explanation & Hints:

The FCS field in a frame is used to detect any errors in the transmission and receipt of a frame. This is done by comparing the CRC value within the frame against a computed CRC value of the frame. If the two values do not match, then the frame is discarded.

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