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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 figure1950年6月25日，朝鲜战争正式爆发。第七舰队驶入台湾海峡，美军别有用心地派飞机“误炸”安东市区，造成无辜百姓伤亡。形势所迫，愤怒的新中国领导人下了亮剑的决心。10月25日，志愿军指挥部成立。彭德怀和邓华等人根据毛泽东的战略构想，提出了打突然、打穿插、打分割包围的计策。由于麦克阿瑟的轻敌，虽然战事艰难，但志愿军将士勇锐顽强，势如破竹，打过了三八线占领了汉城。李奇微临危受命，志愿军面前出现了一个更狡猾，能力更强大的对手。新的战争态势下，双方开始漫长的谈判。经历了无数个惨烈的坑道争夺战后，1953年7月27日，正式停战。毛泽东主席的英明决策令中国打出了民族尊严，打出了新数十年的和平，更打出了一个世界的新格局。上海解放在即，中共上海地下党接到情报，国民党保密局部署制定、代号为“墨斗鱼计划”的绝密档案，将于第二天下午五点押运台湾。情报显示，这份被国民党高层认为“共产党得到它，等于得到了大半座上海城”的档案，是八千多名特务在上海解放后的潜伏计划和详细名单……《刀剑封神录》采用的是双主角模式，一个主角满门被灭，带着莫问剑，流落江湖，另一个主角出生于武林圣地天刀山庄，从小就被当做天缺刀的下一代刀主来培养。The main drafters of this standard are Liu Qiqing, Wang Shuming, Li Pingwang, Du Jianying, Gao Shuming and Wu Jian.Which is more harmful, iqos or real smoke? Since the advent of IQOS, although its development speed has exceeded everyone's expectations, there are still many voices of doubt about the attitude towards IQOS. Doubts about IQOS mainly revolve around whether IQOS is really healthier than traditional cigarettes. Fillmore International is also releasing research data reports on various products in succession, and some international health organizations are also conducting research on this issue. As ordinary consumers, we not only wait and see, but also have our own practical methods.我不离开这儿，你自然也在这儿。