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I’ve seen this issue so much, what it means?
what is its usage? is it just a simple subdomain or not?
It seems that sites with lots of visitors use that!
Any help or suggestion would be greatly appreciated…
The example site for example is as below:
http://static1.cloob.com
thanks,
alireza.
This is a performance optimization practice.
Your server must include a cookie for EVERY HTTP request it receives. That means if your site serves 500 images on the page – the server will send back 500 cookies. That’s obviously bad and slow. That’s why separate domains and sub-domains used to serve static content (images, stylesheets, flash movies etc.) from a cookieless domain.
Read a little more here, for example – Serving Static Content from a Cookieless Domain