What is CDN? | GreenWebPlus


Have you ever had a philosophical look at supermarkets? Places to access the goods you need. That makes it unnecessary to go to the factory’s warehouse. This is precisely what “CDN” does. CDN helps by saving a copy of the static content of your origin server in different pop sites, so you don’t need to connect to the source server every time to get the content you need, but it makes it possible for you to access it from the closest place. Follow this article to know more about CDN.

What is a CDN?

A network of geographically dispersed servers called a content delivery network (CDN) speeds up the delivery of web material by bringing it closer to the users. Caching, a technique that temporarily saves copies of files, is used by data centers worldwide so that you can access internet material through a web-enabled device or browser more rapidly through a server close to you.

CDNs cache web pages, pictures, and videos on proxy servers close to your location. This eliminates the need to wait when performing tasks like watching a ­­movie, downloading software, checking your bank account, posting on social media, or making transactions.

What are the benefits of CDNs?

Now that we understand what a CDN is, it’s time to look at the CDN benefits. Of course, the benefits of CDN are many and vary depending on each business, but in the following sentences, we will bring you the most important ones.

Improving website page load times

Visitors get quicker webpage loading times because of a nearby CDN server, which enables online content delivery closer to website visitors. A website with a long page load time typically has more visitors who click or leave. The rating of the website on search engines may potentially suffer as a result of this.

Therefore, having a CDN can decrease bounce rates and increase the time users stay on the site. Thus, a website that loads quickly will attract more people and keep them there longer.

Reducing bandwidth costs

The data that makes up the content a user asks for from a website or an online application must travel over physical paths to the user’s device. However, the bandwidth usage increases with the distance these assets must travel to reach their destination. In the end, this raises the price of bandwidth for firms.

High-resolution video and graphics are preferred by the online community, which makes the issue worse by adding to the data burden.

A CDN can reduce the quantity of data and distance needed to fulfill a user’s request by caching content data at network edge servers. Instead of connecting to the origin server, the cached version of the website is retrieved.

Increasing content availability and redundancy

Redundancy and availability of content are rising. Hardware issues or high online traffic might disrupt a website’s usual operation and cause downtime. A CDN can manage more web traffic and withstand hardware failure than multiple origin servers because of its distributed architecture. In addition, other active servers can take over and maintain service continuity if one or more CDN servers go unavailable for any reason.

Improving website security

It is perfect for reducing DDoS assaults since it uses the same procedure that CDNs use to handle traffic spikes. These are attacks when hostile actors send a large number of requests in an attempt to overwhelm your application or origin servers. Customers’ access to the website may be affected if the server goes down because of the volume.

A CDN effectively serves as a DDoS mitigation and protection framework, with the GSLB and edge servers dispersing the load evenly throughout the network’s total capacity. Additionally, CDNs can offer certificate administration and automatic certificate issuance and renewal.

How does a CDN work?

To understand how a CDN work, you must first comprehend the origin and edge of web servers in order.

origin server

A computer running one or more programs designed to listen for and respond to incoming internet requests is known as an origin server.

edge servers

The term “edge servers” describes servers (compute resources) that carry out processing at an edge location, anywhere along the edge spectrum, typically from on-premises edge to regional edge.


CDN makes a copy of the static content of your origin server and caches it in different geographical locations (edge servers are the same servers that store your copied content.). This way, CDN makes accessing your website easier for people from different parts of the world.


In this article, we tried to introduce you to the concept of CDN and how it works. In addition, we have listed the benefits of CDN for you. We hope this article was helpful for you. Finally, don’t forget that it is better to go for advanced cloud technologies as soon as possible to develop your business and forget about traditional infrastructure. Green Plus CDN is at your service for the best development of your business.


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