计算机网络-第3章拥塞控制原理及总结-同步电大进度

ゞ浴缸里的玫瑰 2023-01-15 03:57 93阅读 0赞

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拥塞控制是一个全局性的过程，涉及到所有的主机，所有的路由器，以及与降低网络传输性能有关的所有因素。而流量控制只是一个端到端的问题。

*  **A.true**
 *  B.false

### 快速重传的条件 ###

**TCP直到收到3个冗余ACK才执行快速重传。为什么TCP设计者没有采用“收到对报文段的第一个冗余ACK就快速重传”这种机制呢？**

为了排除传送过慢的因素，并区分包的丢失是由于链路故障还是乱序等其他因素引发。选择三次比较稳妥。

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