题目内容

For CRC, if reciever finds there is a remainder, there must have been an error.

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If the error rate of physical link is high, error detection and retransmission is usually more efficient

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Error-detecting codes only include enough data to let the receiver determine whether the data is faulty

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Hamming code (using even parity check) is used to correct 1 bit error. If the bit stream received is 001100011100, it is a correct transmission.

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For Hamming Distance, which one of the following statements is correct?

A. The Hamming Distance of even parity check is 1
B. The Hamming Distance of odd parity check is 2
C. If the hamming distance is d, d+1 errors can be detected;
D. If the hamming distance is 2d, d errors can be corrected.

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