CC protection can use either a high-defense server or a CDN. The specific method chosen depends on the specific needs and circumstances.

　　High-defense servers are servers specially designed to resist DDoS and CC attacks and have powerful network processing capabilities and protection mechanisms. They are usually equipped with high-performance hardware devices, powerful firewalls and traffic cleaning systems, which can detect and filter out malicious traffic and ensure that normal business traffic can pass smoothly. High-defense servers provide strong protection capabilities and can effectively deal with large-scale CC attacks. They are especially suitable for protecting direct access to servers.

　　CDN (Content Distribution Network) is a kind of cache of static content to server nodes around the world, providing fast and stable content transmission services through nearby access and content distribution. CDNs can help spread traffic, reduce load on origin servers, and provide a degree of protection against DDoS and CC attacks. CDN providers usually have a node network with global coverage and can establish caching, acceleration and load balancing layers between users and origin servers to provide users with a faster access experience and at the same time provide certain protection capabilities.

　　When choosing to use a high-defense server or a CDN, you can consider the following factors:

　　1. Requirements and budget: If your main need is to protect direct access to the server, especially against CC attacks, then a high-defense server may be a more suitable choice. If you are more concerned about the acceleration and load balancing of content transmission, and also want to take into account certain protection capabilities, then CDN may be more suitable.

　　2. Attack scale and type: If you expect to face large-scale CC attacks and need strong protection capabilities to deal with them, then a high-defense server may be more suitable. If you mainly face smaller-scale attacks, or are more concerned with accelerating the delivery of content, a CDN may be enough to meet your needs.

　　3. Business characteristics and geographical location: Depending on your business characteristics and the geographical distribution of target users, it may be more advantageous to choose a CDN service provider that can provide global coverage and nearby access. High-defense servers are more suitable for scenarios that require direct connection and protection.

　　In summary, both high-defense servers and CDN are effective CC protection methods. Choosing the appropriate method depends on your specific needs and budget. In some cases, the combination of high-defense servers and CDN can achieve better results, providing more comprehensive protection and performance optimization.