也就是说，编码数据包对丢包较不敏感，因而有助于提升传输的可靠性。
In other words, coded packet is less sensitive to loss, which indicates its possibility to improve transmission reliability.
一旦进入网络驱动(通常是传输一个数据包时)以及在进程调度器的空闲循环的时候，对网络接口进行轮询。
We poll the network interface anytime we enter the network driver (typically for transmitting a packet) and from the process scheduler's idle loop.
操作系统会因为一个硬件事件而产生中断(例如出现了一个来自网卡的数据包)，对该事件的处理过程从一个中断开始。
When an operating system is interrupted because of a hardware event (such as the presence of a packet through a network adapter), the processing begins in an interrupt.
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