In Linux, TAP's full name is "Tunneling traffic access point". It is a virtual network card technology used on Linux, which can provide secure network connections for applications. A virtual network can be implemented using the TAP network interface. This virtual network can provide an environment similar to a real network for applications to be tested in the software without establishing actual network conditions.
#The operating environment of this tutorial: linux7.3 system, Dell G3 computer.
What is linux tap
The detailed explanation of the TAP network interface in Linux is a very important part of Linux network management. It can be used Establish virtual networks, simulate networks, manage network traffic, and implement secure network functions, etc. This article will introduce the basic principles of the TAP network interface, how to use it for network management, the difference from Ethernet, and its more application scenarios.
TAP, Tunneling traffic access point, is a virtual network card technology used on Linux, which can provide secure network connections for applications. The design of TAP is that it is a virtual network card. Like a real Ethernet card, it can be mapped to the network and can then send and receive network data packets. The TAP network interface can be used to establish virtual networks, simulate networks, manage network traffic, and implement secure network functions.
Linux can realize direct data packet transmission between two or even multiple computers through the TAP network interface, and can also achieve network isolation through multiple routers to safely transmit data. Using the TAP network interface, users can not only provide network services to users according to certain rules, but also manage network traffic through control to ensure network security.
Using the TAP network interface, a virtual network can be implemented. This virtual network can provide an environment similar to a real network for applications to be tested in the software without establishing actual network conditions. The TAP network interface also helps manage network traffic, filtering useless data packets from the network, protecting network security, and reducing dependence on network speed and network quality.
Compared with Ethernet technology, TAP technology is more suitable for establishing virtual networks on Linux systems, such as network security, network isolation, and the use of network agents. TAP can also be used in conjunction with Ethernet to utilize dual functions of network resources.
As can be seen from the above introduction, the TAP network interface is widely used in Linux network management. It can be used to establish virtual networks, simulate networks, manage network traffic, and implement secure network functions.
In short, the TAP network interface is a very commonly used network technology on Linux systems. It can not only be used to connect different computers, but also can be used to establish virtual networks to achieve network security and network isolation. Utilize network resources more efficiently.
The difference between tap and tun:
tap is located at the second layer (data link layer) of the network OSI model, and tun is located at the third layer of the network. Here is a brief explanation of tap.
Tap practice on Linux host
If you want to use the Linux command line to operate a tap, first Linux must have the tun module (Linux uses the tun module Implemented tun and tap).
The checking method is as follows:
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
