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In TCP/IP protocol, TCP protocol provides reliable connection service and uses three-way handshake to establish a connection.接着，众人又商议在正月十五这天两家互换信物，作为聘礼，郑家摆酒，只请张家人为证，省得张扬开来。麦迪那轻蔑地说道，不过他们的炮也在东面，知道这意味着什么么？横摆太大的话，他们下层的炮可能无法打开，能打开的炮也不得不仰到一个极大的角度。虽说刘邦号称有五十六万大军，但是如果能够兵不血刃地占领城池，谁还会拼死拼活地死磕呢？依照彭城现在的守军数量，坚持数日自然是没有任何问题，在此期间若是项羽大军返回，指不定会发生什么呢？可以说有着偌大的风险，冒险是不值得的。晚上我请客，算是赔罪。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.