CDN, or Content Delivery Network, prevents DDoS (Distributed Denial of Service) attacks mainly through several mechanisms:
Firstly, CDN has a large number of edge nodes distributed around the world. When a user requests content, the request is first directed to the nearest edge node. This dispersion of traffic can effectively alleviate the pressure on the source server, making it difficult for attackers to concentrate their attacks on a single point.
Secondly, CDN can perform traffic cleaning. By identifying and filtering out abnormal traffic, such as traffic from known malicious IP addresses or traffic that does not conform to normal user behavior patterns, CDN can ensure that only legitimate traffic reaches the source server.
Moreover, CDN can also adopt various security protection technologies, such as IP blocking, rate limiting, etc., to further prevent DDoS attacks.
For example, when an attacker attempts to launch a DDoS attack on a website, the CDN can distribute this malicious traffic across multiple edge nodes through its global network. At the same time, the CDN's traffic cleaning system identifies and filters out this malicious traffic, ensuring that the website can still operate normally.
In terms of cloud services, Tencent Cloud's Anti-DDoS service is a professional DDoS protection product launched by Tencent Cloud. It integrates multiple anti-DDoS technologies, including CDN-based traffic cleaning, to provide users with efficient, stable, and secure DDoS protection services.