I have seen on the web some domain names having prefix of ww2 or ww3 or so (ww2.somedomain.com, ww3.yourdomain.com). And these happen mostly when travelling from a page to page. What would be the reason of having such subdomains? Is there anything special about them or are they just another sub domain? I mean, are they useful in any particular context?

Was just curious to know. Thanks.

Accepted Answer

People running large(-ish) sites used to do this when they needed to break up the load between more than one server. One machine would be called www then the next one would be called www2, etc.

Today, much better load balancing solutions are available that don't require you to expose your internal machine naming conventions to the browser clients.

Written by Greg Hewgill
This page was build to provide you fast access to the question and the direct accepted answer.
The content is written by members of the stackoverflow.com community.
It is licensed under cc-wiki