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checksum 校驗和 ;
(依據數據包內容計算出來的連同數據包一起被發送的一個值,接收端收到此包后,依據數據包內容計算出另一數值,和傳送來的數值比較, 若相同,接收端認為此數據是正確的) 校驗和 ; (依據數據包內容計算出來的連同數據包一起被發送的一個值,接收端收到此包後,依據數據包內容計算出另一數值,和傳送來的數值比較, 若相同,接收端認為此數據是正確的) checksum 總和檢查; 核對總值 checksum 核對和 checksum n 1: a digit representing the sum of the digits in an instance of digital data; used to check whether errors have occurred in transmission or storage the contents of a block of data and which is transmitted or stored along with the data in order to detect corruption of the data. The receiving system recomputes the checksum based upon the received data and compares this value with the one sent with the data. If the two values are the same, the receiver has some confidence that the data was received correctly. The checksum may be 8 bits (modulo 256 sum), 16, 32, or some other size. It is computed by summing the bytes or words of the data block ignoring {overflow}. The checksum may be negated so that the total of the data words plus the checksum is zero. {Internet} {packets} use a 32-bit checksum. See also {digital signature}, {cyclic redundancy check}. (1996-03-01)
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