Dear All,

Ofter we see this scenario when we type in some website like google.com and it gets redirected to www3 or www2 or www1.google.com .

I wondered what is it? Just a google search took me to many webpages regarding this information.

We all know that “WWW” stands for World Wide Web, which is a kind of prefix before normal domain name. Web created around 1990 in Geneva, Switzerland. But what is WWW1 or WWW2?

You must noticed www1 or www2 once in a while when you are visiting a website. WWW1, WWW2 or even WWW3 is nothing but a mirror
of the original web server which is typical WWW. Many websites like
government, banks even major search engines like Google(www1.google.com
or www2.google.com) and Yahoo(www1.yahoo.com or www2.yahoo.com)! uses
www1 and www2. The main purpose of this techniques is to reduce server
load. Sometimes the original server need to be updated or modified but
major websites like .gov, .edu, google.com, yahoo.com cannot just shut
their main server down for hours to update their system. Therefore, they
need to use www1 or www2 duplication of their mainframe server.

Sometimes this different servers used for the serving users based on
their geographical location. Suppose, if someone type www.google.com
form US, they might be taken to the original google server which means
www.google.com but if someone type www.google.com from Africa, it might
take them to www2.google.com or www1.google.com.

Read: http://mrattock.blogspot.in/2011/03/what-is-www3-or-www2-or-www1.html

But i am yet to explore how this server load balancing takes place  :)


Best regards,
Vishal Girish Joshi

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