networking - 定义做某事所需的时间(延迟、吞吐量、带宽)

Question

我了解延迟 - 消息从发件人到收件人所需的时间 - 和带宽 - 在给定时间内可以传输的最大数据量 - 但我正在努力寻找合适的术语来描述相关事物:

如果协议(protocol)是基于对话的——负载在端点之间被拆分成许多来回——那么延迟会影响“吞吐量”¹。

¹ 这个叫什么，有没有简洁明了的解释？

Answer 1

网上冲浪，尝试优化我的 nas (nas4free) 的性能我遇到了 page描述了这个问题的答案(恕我直言)。特别是这个部分引起了我的注意:

"In data transmission, TCP sends a certain amount of data then pauses. To ensure proper delivery of data, it doesn’t send more until it receives an acknowledgement from the remote host that all data was received. This is called the “TCP Window.” Data travels at the speed of light, and typically, most hosts are fairly close together. This “windowing” happens so fast we don’t even notice it. But as the distance between two hosts increases, the speed of light remains constant. Thus, the further away the two hosts, the longer it takes for the sender to receive the acknowledgement from the remote host, reducing overall throughput. This effect is called “Bandwidth Delay Product,” or BDP."

这听起来像是您问题的答案。 BDP as wikipedia describes it

总而言之，它称为带宽延迟积 (BDP)，我找到的最简短的解释就是上面的解释。 (Flexo 也在他的评论中指出了这一点。)