images subdomain?

[Kerms]

Hello,

I have seen several sites use a images.nnn.com subdomain for all their images.

Can someone tell me some of the reasons for doing this?

[Durham_e]

The reason is that the subdomain may be hosted on a server that has limitless space and bandwith, say for big file images or video. The main domain being on a another server say in a country adventageous for serving the actual audience. Think SEO etc. It sounds like a good scheme and I was about to ask a question on the best way to set up such an arrangement in terms of DNS etc.

[thecoalman]

One reason is it will speed up load times for the page for people with faster connections. A browser will only send out X amount of requests to a domain and won't make any others until those have been filled. Since a sub-domain is considered a separate domain it will download the HTML, css files, .js or whatever else you may have from the main domain while simultaneously downloading the images from the sub domain.

[Durham_e]

Thanks Coalman.

There are some good reasons to use a subdomain and I also like how the domain branding is maintained.