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Cache/Proxies

Imagine if every time you wanted a new book you had to write to the author and ask for a copy. Fortunately we have book shops and libraries to do the hard work for us. These keep a local supply of the most popular books from around the world all in one place.

When you request to view a web page, you do pretty much have to go and ask the author, and though distance is no object over the Internet, it can still take time to reach these far away places. So why don't we have local Internet libraries to hold popular web pages from around the world? Well this is what a proxy server does. A proxy server keeps an enormous cache of the most asked for web pages all in one place and in your own part of the world.
Courtesy of TheScream

Blueyonder use what is called transparent caches which automatically puts you through your local cache. This saves traffic on their network and peering (to the rest of the internet) since they cache content that can be viewed by others on their network without having to go over the internet.

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