What are the characteristics of the hierarchy of network communication protocols

time：2024-10-30 09:02:41 Review Insights

What are the characteristics of the hierarchy of network communication protocols

The hierarchy of network communication protocols has the following characteristics:

1. Hierarchical structure: The network communication protocol is divided into different levels according to the function and level, and each layer is adjacent to the task level for interaction.

2. Each layer has its own functions: for example, the physical layer is responsible for transmitting bitstreams, the data link layer is responsible for error checking and correction, and the network layer is responsible for routing and data packing.

3. Each layer has defined tasks and interface standards, and each layer interface communicates, and there are clearly defined interface specifications to enable different levels of protocols to interact with each other.

4. Bottom-up data encapsulation: When data is transmitted from the upper layer to the lower layer, each layer will add some of its own header information on the basis of the original data to form a data unit at each level.

5. Top-down data decapsulation: When data is transmitted from the lower layer to the upper layer, each layer will parse and remove the header information added by itself, leaving only valid data.

6. Except for the lowest layer, each layer provides services to the upper layer and the next layer of users.

7. The user's application as the top.

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