I see www.google.com, www2.google.com, and www3.google.com are valid names and worked on my browser. I wonder why there are www, www2, www3. What are the benefits and when to register them.
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I see www.google.com, www2.google.com, and www3.google.com are valid names and worked on my browser. I wonder why there are www, www2, www3. What are the benefits and when to register them.
The www2 and www3 are simply subdomains. They could have just as easily named them subdomain1.google.com, subdomain2.google.com, etc. They are not something you 'register'. You just add them to your domain in your hosting control panel. What are the benefits? Just an organizational thing, to keep different campaigns separate, or to issue subdomains to different marketers or ads.
Google I'm sure has a host of different machines that they use to load balance the traffic and each one has to have a separate subdomain that is addressed to google.com. In a single machine, it can help in organization as well, but you don't get the load balancing. I use subdomains for a couple of different redirects so I can keep track of who is going to those redirects.