Data Link Layer between organization and network

目录

检错编码：

奇偶校验码

CRC循环冗余码

Data Link Layer between organization and network

Data Link Layer between organization and network

检错编码：

校验原理

奇偶校验码

硬件实现

Data Link Layer between organization and network

Data Link Layer between organization and network

D，发生偶数个错误并不能检验出来。

CRC循环冗余码

Data Link Layer between organization and network

Data Link Layer between organization and network

Data Link Layer between organization and network

Data Link Layer between organization and network

纠错编码

海明码

Data Link Layer between organization and network

Data Link Layer between organization and network

Data Link Layer between organization and network

Data Link Layer between organization and network

Data Link Layer between organization and network

Data Link Layer between organization and network

Data Link Layer between organization and network

奇偶校验码：只能检查出奇数个比特错误，检错能力为50%。

循环冗余码：发现单比特错误，近似1。

海明码：发现双比特错误，纠正单比特错误。

Data Link Layer between organization and network

Data Link Layer between organization and network

Data Link Layer between organization and network

Data Link Layer between organization and network

Data Link Layer between organization and network

Data Link Layer between organization and network

Data Link Layer between organization and network

在一段时间内成功发送的平均帧数。

CSMA

Data Link Layer between organization and network

Data Link Layer between organization and network

Data Link Layer between organization and network

Data Link Layer between organization and network

Data Link Layer between organization and network

CSMA/CD

Data Link Layer between organization and network

没有任何信号进入站点就认为信道空闲，但是信号可能正在路上传播。可是总线上的信号电压摆动值不会增大吗？

检验处帧出错-》发生碰撞

Data Link Layer between organization and network

Data Link Layer between organization and network

Data Link Layer between organization and network

CSMA/CD

Data Link Layer between organization and network

Data Link Layer between organization and network

Data Link Layer between organization and network

Data Link Layer between organization and network

Data Link Layer between organization and network

3.9假设使用海明码来传输16位的报文，请问，需要多少检查位才能确保接收方可以检测并纠正出单个位错位？对于报文1101001100110101，请给出所传输的位模式，假设在海明码中使用了偶数位。

使用偶数位，2的幂次值均为校验位，即1,2,4,8,16为校验位，5位校验位。

3,5,6,7,9,10,11,12,13,14,15,17,18,19,20,21位为数据位

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