Content Delivery Network is an integral part of the Internet nowadays. Even if we don’t know how CDN works, we deal with CDN in variety of ways. We interact with CDN on daily basis: when we read articles online, while watching YouTube videos, while online shopping or while doing social media. No matter what kind of data you consume on the internet chance are that you use CDN for that.
When we type any domain name in the address bar of the browser, the browser will find the IP address associated with that domain name. By this IP address, browser can connect and serve the entire subsequent requests to the user. If you have a blog or small website then your domain name may have a single IP address. For a large web application, domain name may have multiple IP addresses. Now when the browser tries to connect with the server it takes some time. This time is depends on the number of factors. One of the factors is the distance between the browser and the host. More the distance, more will be time. So to reduce the time, people use CDN. Suppose visitor is sending request from United States and the host is in India, then it takes more time. But if the host is in United States itself then it takes very less time to serve the request. Here the use of CDN comes into consideration. So to improve user experience and lower the transmission costs, the big companies set up multiple servers with copies of data in different Geo graphical location. This is called CDN.
CDN contains all the static data of the website. So CDN is cluster of cashes which are Geo graphically located and serves as a local caches for static objects. There are multiple CDN for one hosting server. All these CDN contains cached data. Now when the user of the website request for the certain files, Instead of host the CDN will handle the request. CDN takes Geo graphical location into consideration while serving the request. So the file which is near to the user’s location will be served to the user by CDN. This is the main benefit of the CDN. By CDN, we can provide the data with very good speed which is independent of the location of website’s server.
(Also, If you want your blog to perform well then you better go for a good web hosting. MUST READ : How Wp Engine Helps In Content Creation? )
Suppose the nearest node does not have the requested object then that node will ask the other nodes in that CDN. If any of the node is not having the requested object then only the request is sent to the original server.
The CDN is for you if you want to improve user experience, decrease the page loading time, provide secure data, improve SEO, reduce the Bandwidth, etc. If you want to target the international traffic to your website then CDN is must. By CDN, you can reach the many users for downloading files or deploying web applications. So start using CDN from now and enhance the user experience and traffic on your websites.