The internet uses the end-to-end principle: information moves from the hosts to the clients. When the internet started, this was to keep content delivery simple and easy. The growth of the internet meant that content delivery networks (CDN) became necessary – but what is a CDN? And how does it work?

1. WHAT IS A CDN
AND HOW DO
THEY WORK?
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2. THE BEGINNING OF
CONTENT DELIVERY
NETWORKS (CDN)

3. Its primary purpose is to deliver the information
requested by a user quickly, improving site
experience and performance. It is a network of
proxy servers and data centres that deliver
content with high performance and high
availability to end-users.

4. WHAT IS A CDN?
CDN nodes are spread out over multiple
locations. This is done so that bandwidth
costs are reduced, page loading is faster,
and the reach of content has a broader
range globally.

5. WHO USES
CDNs?

6. Using a CDN depends on the needs of the user or
content provider. Most websites with a global
reach and wide-ranging traffic use a CDN to
handle the load. These websites tend to deliver
services such as entertainment, health,
government, e-commerce and trade, education,
online gaming and advertising.

7. HOW DOES A CDN
WORK?
When a user visits a website, this triggers a series of
connections. First, through an Internet connection,
the servers nearest to the user’s location are selected.
The CDN then collects information on the website
visited, including images and texts, that are saved in
servers distributed in different geographic locations—
the cached content.

8. WHO ARE THESE
CDN PROVIDERS?

9. CDNPROVIDERS

10. CONTENT DELIVERY
NETWORKS TODAY
Considerable advancements continue to improve
user experience. Cached versions of web content are
made available to millions of users at the same time
because of CDN capability, all stored in various
locations or PoPs to reach users located in every part
of the globe.

11. STAY CLASSY.
UNTIL NEXT TIME…