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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刘邦又岂能舍得放走宝贝张良，自然是能避则避，能躲就躲了。When the "S" key is pressed, the program stops. When the "G" key is pressed, everything continues.注：第23集两集为一集，总计24集1921年的广州西关南珠里，是梁锦坤等四个少年的天堂，看似和睦的家庭和邻里关系中隐含着巨大的危机，但这并不为少年人查知，他们一味沉湎于青春的恣意快乐和无端忧郁中。As mentioned earlier when summarizing and viewing commands, the--line-number option can be used to list the sequence numbers of rules, as shown in the following figure.剑雨腥风江湖路浪迹天涯为血仇，英雄儿女多恩怨，经颜自古是薄命，一朝快意恩仇定乾坤。手持“断肠剑”的“飞天猪”是个神出鬼没、作风诡异的职业杀手。而且，处处与“盲侠”作对。原来“飞天猪”就是卖艺团的“书呆子”仲贤，他的杀父仇人也是白无常。为了报父仇，不让任何人在他之前杀了白无常，所以，次次干扰“盲侠”杀白无常。然而，为了报仇，本性善良的他对杀戮变得麻木不仁，心中唯一的目标就是杀掉白无常！当“盲侠”几经周折找到白无常时，“飞天猪”再次出现……当他看到金鱼被“一刀了”把刀架在脖子上时，仲贤恢复了善良的本性，和“盲侠”一起同白无常、“一刀了”展开了一场为“复仇”起的大决战……