Does google contribute ranking from cdn.example.com to example.com?

Posted by DesignerGuy on Pro Webmasters See other posts from Pro Webmasters or by DesignerGuy
Published on 2012-09-20T19:33:06Z Indexed on 2012/09/20 21:54 UTC
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Filed under:

seo

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dns

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cdn

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cname

Background

From my understanding, http://mywebsite.com/image.jpg, can help the ranking of http://mywebsite.com in a search engine, such as Google (obviously the search engine of primary concern).

So, SEO-wise, moving an image to http://whatever-cdn.com/my-account/image.jpg is bad.

A popular solution is to use a CNAME record, such as http://cdn.mywebsite.com, so that image.jpg can be accessed at http://cdn.mywebsite.com/image.jpg.

The question

Does http://cdn.mywebsite.com/image.jpg rank as effectively as http://mywebsite.com/image.jpg ?

Does it help boost the main http://mywebsite.com ?

Or, does it rank independently because it is a subdomain?

Is there another option (a way to use a CDN without sacrificing ranking)?

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