CRC是校验错误最有效的系统之–。CRC由产生于发送装置的两个校验字符组成,这两个字符加在被发送数据结尾。用相同的方法,接收装置对于接受的数据产生自身的CRC,并把它和发送器产生的CRC进行比较,确保数据正确发送。在这一-节里不做CRC的完整的数学推导。有关这方面的内容可在很多关于数据通讯的文章中查找。在计算CRC中应该理解的基本步骤如下:CRC里的位数乘上组成信息的数据位数。
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