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Compute the CRC-3 code for the binary data "110101" using the polynomial x³ + x + 1

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Compute the CRC-4 code for the binary data "0101100" using the polynomial x^4 + x^3 + x + 1

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is the following data corrupt? 110110010 Assume the data is protected with a CRC-3 using the polynomial x^3 + x^2 + 1

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Compute the checksum code for the following data: Hex(CC AA F0 C3) Use a word size(n)of8

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When are error detection codes not used?

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Why is it generally more advantageous to use a parity block instead of just mirroring (duplicating) the data?

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