文件名称:crc-algorithm
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The cyclic redundancy check, or CRC, is a technique for detecting errors in digital
data, but not for making corrections when errors are detected. It is used primarily
in data transmission. In the CRC method, a certain number of check bits, often
called a checksum, are appended to the message being transmitted. The receiver
can determine whether or not the check bits agree with the data, to ascertain with
a certain degree of probability whether or not an error occurred in transmission. If
an error occurred, the receiver sends a “negative acknowledgement” (NAK) back
to the sender, requesting that the message be retransmitted
data, but not for making corrections when errors are detected. It is used primarily
in data transmission. In the CRC method, a certain number of check bits, often
called a checksum, are appended to the message being transmitted. The receiver
can determine whether or not the check bits agree with the data, to ascertain with
a certain degree of probability whether or not an error occurred in transmission. If
an error occurred, the receiver sends a “negative acknowledgement” (NAK) back
to the sender, requesting that the message be retransmitted
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crc.pdf