Five statements are given about error-checking methods. (a)Tick (✓) to show whether each statement applies to Automatic Repeat reQuest (ARQ), check digit or checksum. Some statements may apply to more than one error-checking method. | Statement | ARQ (✓) | Check digit (✓) | Checksum (✓) | | :--- | :--- | :--- | :--- | | checks for errors on data entry | | | | | uses a process of acknowledgement and timeout | | | | | compares two calculated values to see if an error has occurred | | | | | may resend data until it is confirmed as received | | | | | checks for errors in data after transmission from a computer to another | | | | (b) Identify one other error-checking method. \_\_\_\_ [1]

2021 - O/N - 0478/13 | Q3

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Five statements are given about error-checking methods. ...