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关于数据校验

1.请问通过AF_DataRequest发送的数据协议栈本身提供了校验机制吗,需要在应用层对数据进行手工校验吗?

2.Monitor and Test API本身提供了校验机制吗,看帧格式里都不包含校验位,那么利用ztool与协议栈通信是怎么保证数据正确性的呢?