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循环冗余校验码CRC是一种纠错码,编码规定在被校数据位后增加若干校验位,使得形成的CRC码被生成多项式除,若传送数据正确无误,除法结果余数为零;若传送数据出错,则除法余数不为0,根据(3)可得知哪位数据出错,其中生成多项式是经过特殊筛选出来的不是任意指定的,同时除法运算是(4)。

  • A.余数与出错位有一一对应关系
  • B.对余数再作算术运算
  • C.根据余数进行推理
  • D.对余数作逻辑处理
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