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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.It is precisely because the seriousness of learning this matter belongs to education in a broad sense that the cost of making content is very high. From the syllabus to the courseware to the final presentation form, many adjustments and corrections need to be made.那好，我可以传话过去。这时，杨蓉吐了一口长气，吐出的白气笔直的射出去，犹如一道气箭。The successful detection of this major case is also a consolation to the 23 crew members.No.4 Karry Wang