Both high-defense servers and CDN defense are technologies used to protect network services from malicious attacks and abnormal traffic, but they work and are applied differently. Here are their differences:

　　High defense server:

　　Location: High-defense servers are usually physical servers deployed in data centers, similar to ordinary servers.

　　How it works: High-defense servers use hardware and software technologies to defend, including firewalls, intrusion detection systems (IDS), intrusion prevention systems (IPS), etc., which can identify and intercept malicious traffic and attacks.

　　Goal: High-defense servers are mainly used to protect a single server or server cluster to help resist various types of network attacks, such as DDoS attacks, malicious scanning, etc.

　　Advantages: High-defense servers provide more refined control and customization options, and are suitable for situations where in-depth protection of the server is required.

　　CDN defense:

　　Location: CDN (Content Delivery Network) is composed of distributed servers located in different locations around the world. These servers are called edge nodes.

　　How it works: CDN distributes the static content of websites or applications to edge nodes and caches these contents, thereby reducing the load on the origin server and also providing a certain degree of defense functions, such as intercepting some malicious traffic.

　　Goal: CDN is mainly used to accelerate content distribution and improve access speed. It can also partially resist certain types of attacks, such as distributed denial-of-service attacks (DDoS).

　　Advantages: CDN provides global distribution, can provide better access performance, reduce the load on the source server, and has certain defense functions. Suitable for situations where user experience and content distribution speed need to be improved.

　　When choosing a defense solution, you can decide whether to use a high-defense server or CDN defense based on actual needs, or combine the two to obtain more comprehensive protection. For large-scale DDoS attacks, it is often more effective to use a dedicated DDoS protection service.