指定在给定链路上丢失的数据包数。
Specifies the number of packets that are lost on a given link.
这是发送和接收终端，让信息像差错或丢失的数据包。
It is the sending and receiving endpoints that keeps information about such things as errored or missing packets.
无损协议对待丢失的数据包要求重传，这大大增加了传输时间。
Lossless protocols require retransmission of lost packets, which substantially increases transmission time.
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