Building Mobile and Web Apps using CDNs

by Ajesh Joy

on March 26, 2018

What is CDN

Content delivery networks (CDN) is, in short, a  transparent backbone of the Internet in charge of content delivery. Whether we know it or not, every one of us interacts with CDNs on a daily basis; when reading articles on news sites, shopping online, watching YouTube videos or perusing social media feeds.

No matter what you do, or what type of content you consume, chances are that you’ll find CDNs behind every character of text, every image pixel and every movie frame that gets delivered to your PC and mobile browser.

To understand why CDNs are so widely used, we first need to recognize the issue they’re designed to solve. Known as latency, it’s the annoying delay that occurs from the moment you request to load a web page to the moment its content actually appears onscreen.

That delay interval is affected by a number of factors, many being specific to a given web page. In all cases however, the delay duration is impacted by the physical distance between you and that website’s hosting server. A CDN’s mission is to virtually shorten that physical distance, the goal being to improve site rendering speed and performance.

How does a CDN work?

When a user goes to a website or uses the App without CDN, the user direct goes to the web host. Web Host is responsible for all the content delivery.Content includes java scripts, CSS, images, videos, in App dynamic content etc.
When your App |Website has a lot of content the challenge is that the speed can be slow if there are lot of users accessing the same web host / App host at the same time.

Here is where the CDNs come into the picture, if a user CDNs for your website and Mobile App, it pulls the data directly from you web|App host and re boardcasts through different Edge locations. These are different Data centres, servers at multiple locations across the world.We call them Content Delivery Networks.

Here is a short pictorial representation before CDN and after CDN

Why should you use CDN for your Mobile App or Website.?

The main reason to use CDNs is to increase your uptime and increase speed and efficiency for all your visitors.
It is more convenient for the users in your App or website when there is less buffering time and any kind of content is loaded instantly.

Most Famous available CDN networks

There are quite a lot of service providers who provide CDN, however, here are our top 5 recommendations

1. Incapsula
2. MAXCDN
3. Edgecast
4. Amazon CloudFront
5. Google App Engine

Each of the above has different commercial plans for CDNs implementation for your Web and Mobile Apps.
Be Wise and do a detailed research to finalize the best CDN for your App|Web Project

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