A content delivery or distribution network (CDN) is a system of
distributed servers deployed in multiple data centers across
the globe, each server holds a copy of the WebPages and other web contents that
the CDN is hosting (This is known as content replication). It delivers these
webpages and other Web contents to users based on the geographic locations of
the users. The closer the CDN server is to the user geographically, the faster
the content will be delivered to that user (Now this is how
it works; When a
specific page or content is requested by a user, the server closest to that user in
terms of the minimum number of nodes
between the server and the user is dynamically determined. This optimizes the speed with which the
content is delivered to that user).
This service is effective in speeding the delivery of contents
with high traffic and have global reach, They also provide protection from large surges in traffic.
Content providers such as e-commerce vendors, live
streaming media companies, on-demand streaming media companies, social
network companies like face book, content management system companies
like wordpress, etc all
host their contents with CDNs. There are many reasons for this but the simple
and common reason is speed (If you host your contents with a single host server and let’s say
your main web server is based in New York, users from Europe or Asia or Africa
must make a number of trans-continental electronic hops before they can access
your files. But if your content is with a CDN, they provide many localized servers
in data centers across the globe which are closer to the user and result in
faster downloads).
Am
sure this will help you decide whether to use a single server host or a content
delivery network when next you have a content to put online.
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Contributors will be acknowledged in their articles.
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