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This article mainly introduces the tcp/ip network interface layer in which layer, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let the editor take you to understand.

The lowest layer of tcp/ip is the network interface layer, and the network interface layer is located in the fourth layer. Because the network interface layer merges the physical layer and the data link layer, the network interface layer is not only the physical medium for transmitting data, but also provides an accurate line for the network layer.

This article operating environment: Windows7 system, Dell G3 computer.

The lowest layer of tcp/ip is the network interface layer.

In the TCP/IP protocol, the network interface layer is located in layer 4. Because the network interface layer merges the physical layer and the data link layer, the network interface layer is not only the physical medium for transmitting data, but also provides an accurate line for the network layer.

The network interface layer is not actually part of the Internet protocol group, but it is a method by which packets are transmitted from the network layer of one device to the network layer of another device. This process can be controlled in the software driver of the network card, or in the firmware or special chip.

This will accomplish some data link functions such as adding a header to prepare for transmission and actually sending through the physical media. At the other end, the link layer will receive the data frame, remove the header, and transmit the received packet to the network layer.

Extended data

The other three layers of the TCP/IP protocol

1. Application layer: the application layer is the first layer of TCP/IP protocol, which provides services for application processes directly.

2. Transport layer: as the second layer of TCP/IP protocol, transport layer plays a mainstay role in the whole TCP/IP protocol. And in the transport layer, TCP and UDP also play a mainstay role.

3. Network layer: the network layer in the TCP/IP protocol is located in the third layer. In the TCP/IP protocol, the network layer can establish and terminate the network connection and find the IP address and other functions.

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