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TCP is connection-oriented, and a connection must be established between either side before sending data to the other. In TCP/IP protocol, TCP protocol provides reliable connection service, and the connection is initialized by three-way handshake. The purpose of the three-way handshake is to synchronize the serial numbers and acknowledgement numbers of both parties and exchange TCP window size information. The process of shaking hands can be represented by the following figure美纱绪和市川逐渐擦肩而过。身体是相连的，但是心却无法相连的两个人的将来…安倍晴明是一位深受皇帝宠信的阴阳师，却一直因为来历不名的身世,遭到百官轻视、排挤……虽然如此，晴明凭借高超的法术，和一群朋友的支持，化解了一系列灵异事件……　　造型指导：杨威|王昊Industrial Revolution 3.0-Information Age: Originated from the United States in the 1940s and 1950s, represented by the application of electronic computer technology, human society entered the "Information Age". The industrial production process is highly automated, and machinery can gradually replace human operations. ?Enter the flight simulator