In simple terms, high-defense CDN adds powerful defense functions on the basis of traditional CDN, which can effectively resist various network attacks and ensure the stable operation of websites or applications. The main function of traditional CDN is to cache the content of the website to the node closest to the user by deploying node servers around the world, thereby speeding up the user's access to the website and improving the user experience. On this basis, high-defense CDN is equipped with professional protection equipment and technology to target the increasingly rampant network threats such as DDoS attacks and CC attacks.

　　From the working principle, when a user visits a website using high-defense CDN, the user's request will first be intelligently parsed to the high-defense CDN node closest to the user. This node will not only respond quickly and provide website content, but also monitor the user's request in real time. Once abnormal traffic is detected, such as a large number of malicious requests or traffic beyond the normal range, the protection system of high-defense CDN will be activated immediately. It will use a variety of technical means, such as traffic cleaning, black hole routing, etc., to divert malicious traffic to a special cleaning center for processing, ensuring that the source server is not affected by the attack, so that normal user requests can smoothly reach the source and obtain the required content.

　　High-defense CDN has many significant advantages. First, in terms of defense capabilities, it can resist large-scale DDoS attacks, such as common UDP Flood, TCP Flood and other attack methods. For CC attacks, high-defense CDN can prevent malicious requests from accessing the source site by identifying abnormal request characteristics, thereby ensuring the availability of the website. Secondly, high-defense CDN is also not inferior in improving website performance. Due to its widely distributed nodes, users can quickly obtain website content no matter where they are, greatly shortening page loading time and improving user satisfaction. In addition, the use of high-defense CDN can also reduce the pressure on the source server, reduce the consumption of server resources, and reduce operation and maintenance costs.

　　The application scenarios of high-defense CDN are also very wide. For the game industry, the online operation of the game requires a stable network environment. High-defense CDN can ensure that game players will not experience freezes or disconnections due to network attacks during the game, thereby improving the player's gaming experience. During promotional activities, e-commerce platforms often face huge traffic pressure and are also vulnerable to network attacks. High-defense CDN can not only cope with high-traffic access, but also prevent attacks to ensure the normal transactions of e-commerce platforms. For various government websites and financial institution websites, security and stability are even more important. High-defense CDN provides them with reliable protection to prevent important information leakage and website paralysis.