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The top-level event is the unit of encapsulation processing, and the event exposed by react is simulated by one or more events.TCP works in the Transport layer, IP in the Network layer, and ARP in the DataLink layer; The data on the second layer is called Frame, the data on the third layer is called Packet, and the data on the fourth layer is called Segment. At the same time, we need to simply know that when data is sent from the application layer, header information will be added to each layer, encapsulated, and then sent to the data receiving end. This basic process you need to know, that is, every data will go through the process of data encapsulation and unencapsulation.白虎公统领北方七十万人马，朱雀公辅助，遥相呼应，分别从西北和正北进攻安国。松江市新安派出所民警魏涛在制止一场蒙面歹徒行凶的事件中开枪将黑社会头目陈一龙击伤，二人由此结仇。陈一龙虽然逃脱，但蒙在面具下那双凶狠的眼睛令魏涛刻骨铭心。陈一龙受托找派出所周所长"摆事"，因周"不给面子"，便组织人马大闹派出所。被已调到刑警队的魏涛碰上，魏涛帮助周所长制服了罪犯，陈一龙劫持了魏的女朋友吴梦，迫使双方交换人质，魏涛从眼睛上认出他就是日前受伤的蒙面人。为揭开陈一龙的真面目，魏涛反复分析他破获的案件，发现疑点甚多，因陈有邱局庇护，魏涛屡屡失败。也因此受到同事的误解和邱局的严厉批评。陈一龙想调入刑警队，遭队长郑重抵制。陈把魏涛视为最大障碍，在军师老陆的策划下，威逼吴梦作假证，反诬周所长和魏涛滥用警械，打伤群众，制造与魏涛争夺女友的假象，混淆视听。周所长因与陈一龙集团斗争，受到邱局斥责，后见局里派陈来审查他，愤而辞职。魏涛急于揭开陈的面目，违纪侦查，邱局恼怒，要处分他，郑重为保护魏涛，同意邱局将陈一龙调入刑警队作为交换条件，并将二人交杨昆管辖。陈一龙因有强大的社会背景和经济实力，迅The much-anticipated list of the first batch of competing cities in the second season was officially released (arranged by the initials of the city names): Chongzuo, Dehong, Dazu, Guangyuan, Heihe, Hezhou, Jincheng, Nanchuan, Qingyang, Shangqiu, Yichun, Yushu and Zhaoqing. Representatives of the first batch of competing cities have drawn lots to determine the "competing partners": Henan Shangqiu VS Sichuan Guangyuan, Guangxi Hezhou VS Heilongjiang Yichun, Heilongjiang Heihe VS Guangdong Zhaoqing, Qinghai Yushu VS Gansu Qingyang, Yunnan Dehong VS Chongqing Nanchuan, Chongqing Dazu VS Guangxi Chongzuo, and Shanxi Jincheng's "competing partners" have not yet been released, triggering speculation.付宇锋卷起袖子，就要找林白拼了。