Why do web services use so many domains?

Re:Why do web services use so many domains? by dexwiz on Monday December 14, 2020 @06:34PM (#25424894)

Another user mentioned SSO redirects for main pages. For assets generally there is a different domain for the CDN, which may load JavaScript. Finally there is an inbuilt limit of simultaneous requests per domain in browsers. Different domains are used to get around this.

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Re:Why do web services use so many domains? by asd4 on Monday December 14, 2020 @07:35PM (#25425481)

I did not know this about connection limits.

The multi-domain assets really bug me when I'm enabling domains one by one in NoScript.

Here is an example of domains used on Amazon's website:

  amazon.com
  www.amazon.com
  amazon-adsystem.com
  associates-amazon.com
  media-amazon.com
  ssl-images-amazon.com

On its own "associates-amazon.com" sounds sketchy, but I suppose you assume the HTTPS page that you loaded from amazon.com knows what its doing.

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Re:Why do web services use so many domains? by dexwiz on Monday December 14, 2020 @11:14PM (#25426937)

The HTTP 1.1 RFC says 2 per domain, but it’s more like 6 for most browsers.

https://docs.pushtechnology.com/cloud/latest/manual/html/des...

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