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【计算机网络】数据链路层 : 差错控制 ( 检错编码 | 奇偶校验码 | CRC 循环冗余码 )★

文章目录一、奇偶校验码二、奇偶校验码特点三、奇偶校验码示例四、 CRC 循环冗余码 ( 原理说明 )五、 CRC 循环冗余码计算示例六、 CRC 循环冗余码生成多项式一、奇偶校验码奇偶校验码组成 :① 信息元 : n − 1 n-1n−1 位 ; 要发送的有效数据 ;② 校验元 :...

【计算机网络】数据链路层 : 差错控制 ( 检错编码 | 差错来源 | 差错分类 | 冗余编码 )

文章目录一、差错来源二、差错分类三、差错控制四、 "物理层" 编码与 "数据链路层" 编码对比五、冗余编码一、差错来源"差错" 来源 : 差错是由于噪声产生 ;① 全局性噪声 :噪声来源 : 由于线路本身的电气特性产生的 “随机噪声” , 该噪声是信道固有的 , 随机存...

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