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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 figureIn actual development, many scenes can be simulated by state machines, for example, a drop-down menu has display, suspension, hiding and other states under hover action. A TCP request has the states of establishing connection, listening, closing, etc. In a combat game, the characters are attacked, defended, jumped, fell, etc.该剧由12个独立的故事结构而成，每个故事都以一位进城打工的农民工为主线，描写他们的喜怒哀乐、爱恨情仇，真实展现他们背井离乡在城市生存的孤苦无奈：进城做保姆的农村妇女深陷婚姻牢笼的悲惨境遇；顶着风险辛苦帮人开黑车却被拖欠薪水的农民司机；处处想帮人解决问题却招致祸端的小区保安；进城打工妻子却遭遇性骚扰的夫妇。悲剧故事的背后，是这些城市边缘人被忽略的自尊，被轻视的命运和他们对融入城市的热切渴望。The following are some small conjectures based on formulas:千户副千户只瞪着眼睛在后面看，这位将军还真有闲情逸致啊。《C.I.B.刑事情报科》讲述的不单是他们抽丝剥茧的情报搜集分析及紧张剌激的拘捕行动，更进一步展示了这些无名英雄的现实生活及感情国度 ─ 钟信(林保怡饰)和钟正(王喜饰)两兄弟均隶属刑事情报科，工作性质高度敏感，压力也非一般工作可比。性格同样谨慎冷静的信和正，在工作上表现出色，屡破奇案，然而二人的家庭及感情生活却饱受挫折……钟信(林保怡)和钟正(王喜)两兄弟均效力香港警察，隶属情报科(CIB)不同组别，信负责监听电话并联络和招募线人，正则负责分析情报。CIB是警队中的无名英雄，工作性质高度敏感，压力也非一般工作可比，信和正的家庭及感情生活也因此而大受影响。1938年的秋天，在沂蒙山深处一个叫马牧池的小山村里，于大娘和丈夫李忠厚带着一家人正操办着二儿子继成的婚礼。看着幸福的小两口，于大娘的大儿媳他大嫂不禁想起了自己当年新婚之夜丈夫李继长逃婚而去。村里的二流子二孬跑来告诉大家来兵了，村里人惊慌失措的跑到了山沟里藏了起来。