Multiple choice

An error-detecting code inserted as a field in a block of data to be transmitted, is known as

  1. frame check sequence

  2. error detecting code

  3. checksum

  4. flow control
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A Correct answer
Explanation

Frame Check Sequence (FCS) is the error-detecting code added to data frames at the data link layer. It uses mechanisms like CRC (Cyclic Redundancy Check) to detect transmission errors. Checksum is a specific type of error-detecting code, but FCS is the broader, more accurate term for the field in network frames. Flow control is a separate function for managing data transmission rates, not error detection.

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