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　　农民生儿传香火，赚了女娃还赔金，夫妻冤家，爱！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.这时，刘婆子进来，陪着说笑几句，又对小葱道：我瞅见樱桃把蛇给炖上了，晚上也是一碗汤，让你喝了解解气。Demand determines the market. In recent years, due to the change of the educational concept of the new generation of parents after the 1980s and 1990s, they are strongly aware that examination-oriented education has certain defects, and the demand for the cultivation of children's comprehensive ability is increasingly apparent. On the other hand, the state has successively issued a series of policies to try to adjust examination-oriented education, and has begun to attach importance to and encourage the development of quality education for young children. All these have directly or indirectly created development space and entrepreneurial opportunities for quality education.3. Shutter-Liu Shiying (Financial Writer and Founder of President's Reading Club)