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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一九四二年，中国守军在日寇的大举进攻下作战略撤退，以于刚为队长的八路军武工队，挺进沦陷区，引领令珞丹的特遣队，一起袭击鬼子的运输列车，炸毁鬼子的弹药库，保护交通要道。武工队打入城内，救出被关押的中国人。鬼子控制了战略要地大峡谷，收买了当地的头面人物，阴谋取得觊觎已久的珍贵珠宝文物。武工队和特遣队以民族大义为重，经耐心细致的思想工作，激发了百姓们的抗日热情，动员百姓团结一致抗击敌人，保卫自己的家园。经过持续努力，沦陷区抗日力量日益壮大，军民一致行动，使日本鬼子逐渐陷入被动，敌占区成了被包围的孤岛。武工队和特遣队作为先头部队掌握了鬼子的军事部署和动向，扫清了障碍。我军适时地发起了总攻，攻克了城池，收复了失地。Game Release: Deep Silver四月，竹林里的青笋猛拔节。2. The term "motor boat" means any ship propelled by machinery.Start building v4:A men: team, individual all-round, floor exercise, pommel horse, rings, vault, parallel bars, horizontal bars, trampoline individual events;