When choosing a high-defense server or a high-defense CDN, you need to weigh and make decisions based on your specific needs and circumstances. Here are some considerations to help you make your choice:

　　High defense server:

　　Scope of application: High-defense servers are mainly used to protect your server itself from network attacks, such as DDoS attacks, malicious traffic, etc. If your server is frequently attacked on a large scale, a high-defense server can provide more powerful defense capabilities.

　　Defense depth: High-defense servers can reduce the impact of attacks on the server to a large extent because all traffic is filtered and cleaned by high-defense servers.

　　Server performance: High-defense servers can protect the performance of the server, ensure normal service operation, and will not cause server crashes or performance degradation due to attacks.

　　High-defense CDN:

　　Global distribution: High-defense CDN can distribute your website content to edge nodes around the world, providing faster access speeds and thereby improving user experience.

　　Static resource optimization: High-defense CDN can cache and optimize your website's static resources, such as images, style sheets, and script files, thereby reducing server load and improving website performance.

　　Reduce bandwidth consumption: High-defense CDN can share the bandwidth burden of the server and reduce the pressure of traffic transmission to the server, thereby reducing network costs.

　　Considering:

　　If you are mainly concerned with protecting your server from large-scale attacks, or your website needs to handle complex computing tasks, a high-defense server may be a more suitable choice. However, if you want to improve website access speed and performance and reduce bandwidth consumption, a high-defense CDN may be more suitable for your needs.

　　In fact, high-defense servers and high-defense CDN are not mutually exclusive choices. You can also use them together to achieve more comprehensive security and performance optimization. The final choice should be based on your specific business needs, budget constraints, and the importance of security and performance.