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A CDN, or Content Delivery Network, is an important and cost-effective way to improve a web application’s user experience, increase a site’s ranking in the search engines, and receive other benefits as well.

What is CDN?

CDN is an abbreviation for Content Delivery Network (or alternately, Content Distribution Network). Physically, a CDN is a network of servers spread across a geographical area. Today, global CDNs are commonly used.

How does a CDN affect security?

CDNs cache data and content from the origin server, and provide it in response to incoming requests. (For more information on this, see What is CDN?) There are several ways to exploit this process, but most are complicated, and have a low possibility of success for the attacker.

Why should you use a CDN?

CDNs provide many benefits, but one of their primary purposes is to accelerate the delivery of content to site visitors. A CDN allows for a page to load more quickly in a visitor’s browser, because much (perhaps even all) of that page’s content can be served by the CDN and delivered from a closer PoP

How does a CDN work?

A CDN changes the traditional flow of client-server traffic. Instead of all requests coming into, and being fulfilled by, a single server, they are routed so that some (or all) are fulfilled by the CDN instead.

What is a Cloud CDN?

Cloud CDN can have multiple meanings. For example, several CDN providers use this phrase as part of a product name. This article will discuss its broader meaning: a CDN that is part of the cloud.