Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Possible Duplicate:
What does wwws mean?

Today I got one link from my friend that starts with something like that

what is difference between www1, www2 and www3 in url

share|improve this question

marked as duplicate by Oliver Salzburg Sep 17 '12 at 12:13

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

Web farms and load balancing

Names like www1, www2, www3 are often used for members of a load-balancing farm of web-servers for popular web-sites where the workload is too much for a single server or where multiple servers are used to proivide continuity of service in the event of failure of a single server.

An example of how it works

A front-end server at initially receives the requests and redirects the browser to an available server in the farm, it does so by returning a HTTP redirect response to the browser, the browser then retries it's request using the redirected URL provided.

It's just a name

It may just be that some parts of a large website are handled by different servers and rather than naming the servers they name them etc.

share|improve this answer

They're just sub-domains. Once upon a time sub-domains used to give a clue to the protocol used (e.g. ftp, gopher, smtp etc.) but today sub-domains are (mainly) just used to route traffic to a specific IP address.

share|improve this answer

Not the answer you're looking for? Browse other questions tagged .