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In CRC calculation if divisor is 1011, and dataword is 1001 what will be the CRC?

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In CRC calculation if divisor is 1011, and dataword is 1001 what will be the CRC?
1. 111
2. 101
3. 110
4. 100

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Correct Answer - Option 3 : 110

Dataword = 1001

Divisor = 1011

Since polynomial is of order 3 append 3 0’s at the end of message

Message: 1011 000

 

  1001 000

        ⊕ 1011
           _____________

                1000

          ⊕   1011
            __________

                    110

CRC = 110

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