Shulou(Shulou.com)06/03 Report--

What this article shares to you is about what is the network layer entity to provide data sending and receiving functions. The editor thinks it is very practical, so I share it with you. I hope you can learn something after reading this article. Let's take a look at it with the editor.

It is the data link layer that provides data sending and receiving functions for network layer entities.

The data link layer is the second layer of the OSI reference model, which lies between the physical layer and the network layer. The data link layer provides services to the network layer on the basis of the services provided by the physical layer, and its most basic service is to reliably transmit the data from the network layer to the target network layer of the neighboring nodes.

The data link layer has two main functions: frame coding and error correction control. Frame coding means defining a packet that contains information frequency, bit synchronization, source address, destination address, and other control information. The data link layer protocol is divided into two sublayers: logical link control (LLC) protocol and media access control (MAC) protocol.

The most basic function of the data link layer is to provide transparent and reliable basic data transmission services to the users of this layer. Transparency means that there are no restrictions on the content, format and coding of the data transmitted on this layer, and there is no need to explain the meaning of the information structure; reliable transmission frees users from worrying about the loss of information, interference and incorrect order.

The above is what the network layer entity provides data sending and receiving functions, the editor believes that there are some knowledge points that we may see or use in our daily work. I hope you can learn more from this article. For more details, please follow the industry information channel.

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