Cyclic Redundancy Check循环冗余校验，是基于数据计算一组校验码，用于核对数据传输过程中是否被更改或传输错误。它是利用除法及余数的原理来作错误侦测的。(Cyclic Redundancy Check cyclic redundancy check is based on data calculation of a set of checksum code used to check whether the data transmission process has been