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Introduction to Content Delivery Networks (CDN)

The fast loading websites always score more audience and sales in the modern internet edge. Content Delivery Networks (CDN) enhance web performance by reducing the web page load time for the web visitors and reducing the traffic load to the origin web server. A CDN is a globally distributed content cache that delivers the content from the closest server location to the visitor.


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Lightning-fast web loading is one of the major service promises that almost every modern web hosting company mentions in their advertisements. Achieving this goal involves a lot of methodologies because the web load time depends on many factors such as the size of web page/content blocks, the performance level of the server, the distance between server and visitor. Content Delivery Networking (CDN) is a methodology to increase the web load speed by reducing the distance between the server and the visitor. A CDN can be defined as a group of servers that are located in different geographical locations to facilitate the distribution of content via the web in an efficient and timely manner. The main goal of a CDN is to serve content from the closest server to the visitor, instead of getting served from the origin web server.



Publication Date

July 1, 2020


Amazon Kindle, Amazon Paperback, Book Depository


D.C. Shehan Marasinghe



Table of Contents

1. Introduction
2. World Wide Web and Web Page Load Time and CDN
3. History of CDN
4. How a CDN works

4.1 CDN Caching
4.2 Route Optimization

5. Anatomy of a CDN
6. Types of CDN
7. Advantages and Disadvantages of using CDN

7.1 Advantages
7.2 Disadvantages

8. A CDN Comparison


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