c" loading="lazy" class="aligncenter size-full wp-image-11596" src="/uploads/2014/05/tcpswwindows.png" alt="" width="660" height="270" srcset="" sizes="(max-width: 660px) 100vw, 660px"/></p>
<p style="text-align: center;">（<a href="http://www.tcpipguide.com/free/t_TCPSlidingWindowAcknowledgmentSystemForDataTranspo-6.htm" target="_blank">图片来源</a>）</p>
<p>上图中分成了四个部分，分别是：（其中那个黑模型就是滑动窗口）</p>
<ul>
<li>#1已收到ack确认的数据。</li>
<l