什么是cdn为什么要使用cdn加速（什么是CDN）

CDN的全称是Content Delivery Network，即内容分发网络其目的是通过在现有的Internet中增加一层新的网络架构，将网站的内容发布到最接近用户的网络"边缘"，使用户可以就近取得所需的内容，解决Internet网络拥挤的状况，提高用户访问网站的响应速度，我来为大家科普一下关于什么是cdn为什么要使用cdn加速?下面希望有你要的答案，我们一起来看看吧!

什么是cdn为什么要使用cdn加速

CDN的全称是Content Delivery Network，即内容分发网络。其目的是通过在现有的Internet中增加一层新的网络架构，将网站的内容发布到最接近用户的网络"边缘"，使用户可以就近取得所需的内容，解决Internet网络拥挤的状况，提高用户访问网站的响应速度。

简单地说，内容发布网(CDN)是一个经策略性部署的整体系统，包括分布式存储、负载均衡、网络请求的重定向和内容管理４个要件，而内容管理和全局的网络流量管理(Traffic Management)是CDN的核心所在。

CDN有什么作用？

CDN能处理整个网站页面的70%～95％的内容访问量，从而解决了网站的并发量，由此减轻了源服务器的访问压力，也同时提升了网站的性能、可扩展性以及安全性。将网站原服务器中的内容存储到分布于各地的缓存服务(Cache Server)中（也就是CDN的节点），通过智能的中心管理系统对网络的动态流量进行分配控制，从而提高用户访问的响应速度和服务的可用性，解决Internet网络拥塞状况，提高用户访问网站的响应速度。

CDN面对攻击时怎么办?

于域名是解析到我们提供的解析记录值上，那么被攻击，攻击的量也只会打到我们CDN节点上，所以网站被攻击源站服务器不会受到影响。CDN国内节点（中国大陆）域名是一定要备案的。

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