|October 2, 2008||Posted by forumadmin under TechQns||
It’s not simply parallelization
The above is not what I am talking about.
It’s not simply redirection to a content delivery network (or maybe it is–see bottom of question)
youtube.com has moved its .JS files to ytimg.com
cnn.com has moved its .JS files to cdn.turner.com
weather.com has moved its .JS files to j.imwx.com
Now, I know about content delivery networks like Akamai who specialize in outsourcing this for large websites. (The name “cdn” in Turner’s special domain clues us in to the importance of this concept here).
But note with these examples, each site has its own specifically registered domain for this purpose, and its not the domain of a content delivery network or other infrastructure provider. In fact, if you try to load the home page off most of these script domains, they usually redirect back to the main domain of the company. And if you reverse lookup the IPs involved, they sometimes appear point to a CDN company’s servers, sometimes not.
Why do I care?
When folks used things like scripts.cnn.com to parallelize, that worked fine with appropriate wildcarding. And when folks used subdomains off the CDN company domains, I could just permit the CDN company’s main domain with a wildcard in front as well and kill many birds with one stone (such as *.edgesuite.net and *.akamai.com).
Why did all these major sites start doing this?
EDIT: OK as “onebyone” pointed out, it does appear to be related to CDN delivery of content. So let me modify the question slightly based on his research…
Why is weather.com using j.imwx.com instead of twc.vo.llnwd.net?
Why is youtube.com using
|Asked By – Tim Farley||Read Answers|