cdn架构图

+-------------------+             +-------------------+                  +--------------+
|  用户浏览器         | -- HTTP/HTTPS 协议 -- |  CDN节点         |                    |
+-------------------+             +-------------------+                  +--------------+
                                             |
                                             | 
                                             v
                                    +------------------+
                                    |  缓存策略      |
                                    +------------------+
                                             |
                                             | 
                                             v
                                    +------------------+
                                    |  动态内容加速   |
                                    +------------------+
                                             |
                                             | 
                                             v
                                    +------------------+
                                    |  静态内容加速   |
                                    +------------------+
                                             |
                                             | 
                                             v
                                    +------------------+
                                    |  数据分发       |
                                    +------------------+
                                             |
                                             | 
                                             v
                                    +------------------+
                                    |  监控与告警      |
                                    +------------------+