Let's see how a website works without a CDN:
A user requests a page whose components (images, HTML, dynamic content) are retrieved from the website's server or origin, which could be anywhere in the world, for example in North America, while the origin containing the requested content is located worldwide.
Now let's see how a web page loads content through a CDN:
A CDN caches all files locally (images, HTML, etc.) in the local PoP they have established. As a result, when an end user requests a web page, it loads faster. If the CDN does not have an image or file requested by the user, it will be loaded from the origin as needed.
CDNs support dynamic content by creating a “superhighway” to speed up content delivery over a longer distance . An individual ISP cannot provide this.
Finally, a CDN must protect itself and all the data it stores, as well as the origin of a website from any data breaches or hackers.
The most common data threat is distributed denial of service (DDoS) attacks. A CDN has appropriate techniques to prevent, detect and correct these attacks.
For example, HTTP load balancing, as a preventive measure, has an always-on approach, thus reducing the vulnerability of sites.
Detection systems within a CDN also look for suspicious behavior and highlight the need for further investigation and action.
An example of detection might be a spike in traffic in which case the CDN provider has systems in place to automatically notify website owners.
Countermeasures such as Secure DNS will block unwanted requests while still allowing trusted requests to be served.
There are websites like Norse or Digital Attack Map , where you can see in real time the attacks and suspicious network activities taking place around the world.
Image:KeyCDN
Most WordPress users are often hesitant about using content delivery networks as canadian colleges universities email list it can be a bit overwhelming at first. However, CDNs can be implemented quickly through a few simple steps:
Select CDN provider
The first thing you need to do is select a CDN provider. Make sure you choose a provider that covers all major continents: Europe, Asia, and America.
Below you will find a list of some CDN providers.
KeyCDN
Image: Screenshot ofKeyCDN
KeyCDN offers a 30-day free trial, no credit card required. The trial period includes: HTTP/2, SSL at no additional cost, 25 data center locations and 5 free zones.
