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While browsing INTEL website I came across the following link

https://www-ssl.intel.com/content/www/in/en/data-center/new-center-of-possibility.html?cid=sem63p45119g-c&intel_term=intel%20distribution%20of%20hadoop&gclid=CN7HpsX5xcYCFUgmjgod9kQEPA

What is "www-ssl"?

Few times while browsing IBM website I have come across "ww3.xyz.ibm.com",

What is "ww3"?

I did not find anything on GOOGLING

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    Try GOOGLING the term subdomain. – Philipp Jul 6 '15 at 7:28
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These are simply Subdomains created by the website owner.

ww3 is often used to share load (ww1,ww2,ww3) on their servers. In you example it seems intel created www-ssl subdomain to separate normal http traffic and https traffic on subdomain level.

If you want more information why somebody is doing this, just ask google or the website owner

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