Content Delivery Network Definition | What is CDN

Learn what Content Delivery Network is, benefits, purposes, market size, and how how does CDN work.

What is a Content Delivery Network?

A Content Delivery Network (CDN) webserver or Point of Presence (POP) is intended to deliver content rapidly. Content in a CDN is copied and stored on multiple servers.

When a visitor tries to access that content from a location, that visitor will get the content data from the nearest server from his geographical location.

Benefits of Content Delivery Network (CDN)

An Information Delivery Network (CDN) is an internet-connected system of computers that distributes web content quickly to many users by replicating or caching it on multiple servers and routing it to users in close vicinity.

Here are some important benefits of using CDN:

1. high-availability and high-performance content to end-users

A CDN’s purpose is to provide high-availability and high-performance content to end-users. Web objects (text, graphics, and scripts), downloadable objects (media files, software, documents), applications (e-commerce, portals), real-time streaming data, on-demand streaming media, and social networks are all served by CDNs today.

2. Increase web page speed

When an end-user requests a specific web page, video, or file, the server closest to that user is dynamically chosen and used to deliver the content, boosting delivery speed. Hundreds of thousands of servers may be used to copy content to give identical content to as many consumers as possible, especially during peak demand.

Companies in the media, entertainment, gaming, software, online shopping, and various other industries with rich digital material on their websites use CDN.

3. CDNs improves performance

Whether they’re watching a movie, streaming an event, playing a game, or shopping online, consumers expect a high-quality online experience. Using CDNs improves performance, resulting in a better consumer experience for end consumers. 

When many people access a web page containing a specific piece of content, such as a movie, a CDN allows that content to be delivered to every one of them instantly.

Additional Advantages of Using CDN

1. The load on your server will be reduced: Companies can enhance their capacity and the number of concurrent users they can accommodate due to strategically placed servers that comprise the network’s backbone. Rather than unloading the content onto a huge server, the content is divided across numerous servers.

2. Content will be delivered more quickly: Operators can deliver high-quality content with a high level of service, low network server loads, and cheaper costs, thanks to increased reliability. Furthermore, jQuery is widely used on the internet. There’s a good chance that someone who visits a specific website has previously done so in the past by using the Google CDN. As a result, the browser has already cached the file, and the user will not need to load it again.

3. Audience segmentation becomes simple: CDNs can serve different materials to different consumers depending on the type of device that requests it. They can detect the mobile device being used and deliver content tailored to that device.

4. Reduced Network Latency and Packet Loss: End-users report less jitter and better stream quality. As a result, CDN users can serve high-definition content with excellent QoS, low prices, and minimal network stress.

5. Increased availability and better usage analytics: CDNs dynamically distribute assets to the core, fallback, and edge servers strategically located. CDNs can help with asset delivery and network load management. They can optimize capacity per client, provide real-time load and analytics views, reveal popular assets, display active regions, and provide customers with detailed viewing details. CDNs can thus guarantee 100 percent availability even in major power, network, or hardware failures.

6. Storage and Security: For businesses that require it, CDNs provide secure storage space for material such as videos and archiving and enhanced data backup capabilities. CDNs can utilize Digital Rights Management to encrypt material and use user authentication to limit access.

7. Google made it very clear long ago that pageSpeed is a ranking factor for google search and ads. Using a content delivery network service will speed up your site significantly. It will also help reduce the bounce rate, and the faster your pages/contents load for any website, the better it is.

How does a CDN work?

A CDN is used to check files (such as HTML pages, CSS stylesheets, and JavaScript files) saved on servers worldwide. It helps improve the website’s performance by reducing the downloading time and bandwidth requirements.

If the file is not found on that server, it will be requested from the main server of your website. The CDN will then serve the file to the nearest available server, which helps improve downloading times and reduce overall bandwidth requirements.

What is the purpose of a CDN?

The main purpose of a CDN is to deliver content through a network of servers securely and efficiently. These networks improve content security, performance, and availability. They are also used to collect user analytics and track data on network traffic. Content-owning organizations use CDN services to accelerate the delivery of static and dynamic content, online gaming, mobile content and streaming video, and other specialized needs.

● An e-commerce organization uses one to deliver content at busy times of the year when traffic spikes are likely.

● A bank uses a CDN to transfer sensitive data securely.

● A mobile application provider uses one of these networks to reduce load times and increase response times, improving mobile users’ customer experience.

The market size of the Content Delivery Network

Growing demand for rich video content among the increasing online users and the digitization trend in organizations across the end-user verticals boost the overall CDN market demand.

According to Cisco’s visual networking index, IP video will have 79% of the online traffic by 2018. With increased internet usage and smart devices, an enormous amount of data is being generated daily, which needs to be smartly managed. Web-performance-optimization solutions are aimed at reducing latency.

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