What is WWW2 or WWW3 ?

You have seen www , http, https —  now why do you see www2 or www3 in many URLs ( web addresses ), what exactly is this www2 or www3 ? For ex www3.google.com What is the difference between www and www2 or www3 ?

In the DNS hierarchy www3 or www2 is simply a subdomain.

Many businesses and complex websites uses a sub-domain of www2 or www3 to separate data or certain services from the their main website ,yet utilizing the advantage of using the original site domain name.

According to wiki : Some websites use different subdomains to point to different server clusters. For example, www.example.com points to Server Cluster 1 or Datacentre 1, and www2.example.com points to Server Cluster 2 or Datacentre 2, etc.

Leave a Reply

Your email address will not be published. Required fields are marked *