Why CDN technology is extremely developed in the world and is applied in most websites? What is a CDN? What can it do for the business?
I. What is CDN
CDN ( content delivery network ) is global system of severs that is responsible for backing up static content inside a website , and then distributes it to servers of different geographic locations , this is called PoP , and users visiting the site will access the PoP closest to you .
II. The difference of website does not use CDN ?
- Website not using CDN : Request for access will sent to the server in Michigan , users will wait about 1 second ( stable network speed ) to access the content they desire . If the network speed is not stable , or there are too many users visiting same time , the server will take longer than usual to speed to respond to the user .
- Website using CDN : The request will be sent to the PoP near the user , this will be sent to PoP in Alabama . Regardless of the network speed , the number of visitors , the users can still access the website faster than non-CDN website .
III. What is the benefit of CDN ?
What can be the CDN ultimately bring about the effect to your website ?
- Delivering content quickly to users : If PoP system stretching in many places , the speed of transferring content to people will also be fast .
- Cost savings: Compared to other services such as Host, VPS, Server, you have to continuously add bandwidth packets or rent more VPS, Server, then for CDN, you can estimate traffic As well as the increase in bandwidth is not expensive.