Data encapsulation
The process of information exchange takes place between peer layers. Each layer in the source system attaches control information to the data, while each layer in the destination system decomposes the received information and removes the control from the data. information.
The high-level protocol transfers data to the network layer to form a standard data packet, and then transmits to the data link layer, adds link layer control information, forms a frame, and then transmits to the physical layer, and transmits the original bits in the physical layer network flow.
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