cdn共振是什么_什么是CDN？

cdn共振是什么

A CDN stands for Content Delivery Network.

CDN代表内容交付网络 。

It’s a series of servers distributed all around the globe, all linked together.

它是一系列分布在全球的服务器，它们相互链接在一起。

In the context of helping speed up a website, their job is to distribute assets (like images, JavaScript files, CSS, also HTML) so that they are reasonably near - physically - to every user that might want to access your website, in order to improve the speed of the connection and reduce the latency.

为了帮助加快网站访问速度，他们的工作是分发资产(例如图像，JavaScript文件，CSS和HTML)，以便它们在物理上合理地接近可能想要访问您网站的每个用户，以便以提高连接速度并减少延迟。

CDNs are the ultimate cache, and the cheapest way to serve content all around the world.

CDN是最终的缓存，也是在全球范围内提供内容的最便宜的方式。

Visitors will never access the actual web server that hosts your files, but instead they will hit those CDN servers, helping to reduce the load.

访问者将永远不会访问托管您文件的实际Web服务器，而是访问那些CDN服务器，从而有助于减轻负载。

A CDN provides

CDN提供

• Speed, being closer to a user’s network improves speed and reduces latency

  速度 ，更接近用户网络可提高速度并减少延迟

• Redundancy, if a node of the CDN fails, other nodes can handle the traffic

  冗余 ，如果CDN的某个节点发生故障，则其他节点可以处理流量

• Reduced costs in bandwidth and server power compared to serving all the traffic from a centralized location that might not be optimized for serving lots of traffic

  与从集中位置为所有流量(可能未针对大量流量进行优化)提供服务相比， 降低了带宽和服务器功耗成本

• Security by adding additional levels of protection at the CDN node level. Not all CDNs do this, but most do and also introduce DDoS attack protection mitigations

  通过在CDN节点级添加额外的保护级别的安全性 。 并非所有CDN都这样做，但是大多数CDN都这样做，并且还引入了DDoS攻击防护缓解措施

A CDN gets the original resource from an origin server, and as long as the origin does not change, it will continue serving its local copy of an asset:

CDN从来源服务器获取原始资源，只要来源不变，它将继续提供其资产的本地副本：

Each CDN server is located in different continents, and depending on how the CDN is built, in different parts of a continent as well.

每个CDN服务器都位于不同的大陆，并且取决于CDN的构建方式，也位于大陆的不同地区。

Every major company uses CDNs for serving assets, and you can too, by leveraging the services of companies like Cloudflare, Amazon CloudFront, Google Cloud CDN, Azure CDN or others.

每个大型公司都使用CDN来服务资产，您也可以利用Cloudflare ， Amazon CloudFront ， Google Cloud CDN ， Azure CDN或其他公司的服务。

CDNs might be integrated directly by your web hosting as well. I use Netlify for example, and they integrate an automatic CDN, which makes my site fast in every location of the world.

CDN也可以通过您的虚拟主机直接集成。 例如，我使用Netlify，它们集成了自动CDN，这使我的网站在世界上的每个地方都可以快速运行。

翻译自: https://flaviocopes.com/cdn/

cdn共振是什么