Introduction
At present, the most important network architecture of the Internet in the world is developing towards. The Internet is a network of several networks connected in series, and these networks are connected by a standard set of network TCP/IP protocols, which connect billions of individual devices around the world to form logic. By 2018, nearly 3.6 billion people in the world will be able to connect to the Internet at least once a month. These technologies and applications have become the mainstream tools for human communication, and their importance is evident [ 1 – 2 ].