Choosing a high-defense server or a CDN (content distribution network) depends on your specific needs and application scenarios. The two have different features and benefits, here are some considerations:

　　High defense server:

　　Applicable scene:

　　When your server faces a large-scale DDoS (Distributed Denial of Service) attack, the high-defense server can provide effective protection to ensure the normal operation of the server.

　　safety:

　　High-defense servers are usually equipped with professional DDoS protection equipment and technology, which can resist various network attacks and ensure the security of the server.

　　Performance:

　　High-defense servers have high performance and availability, can cope with sudden large traffic and attacks, and ensure the normal operation of services.

　　cost:

　　High-defense servers are usually relatively expensive because providing high-level DDoS protection services requires a large amount of network equipment and professional technical support.

　　CDN (Content Delivery Network):

　　Applicable scene:

　　When you want to improve website access speed, reduce server load, and reduce bandwidth costs, you can choose CDN services.

　　Accelerate access speed:

　　CDN distributes content to multiple nodes around the world, allowing users to obtain content from closer nodes and improve access speed.

　　Save bandwidth costs:

　　CDN can reduce the load on the source server and reduce the demand for server bandwidth, thus saving bandwidth costs.

　　Static resource acceleration:

　　CDN is particularly suitable for accelerating static resources (such as images, CSS, JavaScript, etc.) and improving performance by caching and distributing these resources.

　　Global coverage:

　　CDN providers usually have a globally distributed network so that your content can quickly reach users around the world.

　　How to choose a high-defense server or CDN:

　　Comprehensive needs:

　　If you face the risk of large-scale DDoS attacks, a high-defense server may be a more suitable choice.

　　If the main need is to increase website speed and reduce server load, CDN may be more suitable.

　　Cost considerations:

　　If cost is a key factor, CDN is usually more economical than high-defense servers, especially suitable for websites with a large number of static resources.

　　Overall structure:

　　Sometimes, the combined use of high-defense servers and CDN is an effective solution. High-defense servers protect source servers, and CDN provides global acceleration.

　　service provider:

　　Consider choosing a reliable high-defense server and CDN service provider that has a good reputation for network security and performance.

　　The final choice depends on your specific needs and budget. Before making a decision, it's best to conduct a thorough assessment of your application scenarios and risks.