File Upload/Storage Question

I've seen some webpages with URL's that look like this one:

http://www.test.example.com/

The part I am wondering about is the . in the middle, what does it represent?

Sorry if this question is vague I really didn't know how to word it.

http://www.test.example.com/ is a subdomain.
http://www.example.com is the domain.

I'm sure there are people who could explain it a bit more thoroughly, but it's like a website within a website.

http://test.example.com/

Test is a subdomain while example is a domain.

The . represents the separator... it basically tells that test is part of example.

And by the way, there are no www's when a subdomain is present...

http://www.domain.com is correct
sub.domain.com is correct
http://www.sub.domain.com is incorrect

Breeze basically got that right

Forgot that bit though

You did


But we all do forget things

Well actually, www is a subdomain Bogey

http://en.wikipedia.org/wiki/Domain_name_system

I know SpooF, the reason www. is not allowed in a sub-domain site (http://www.sub.domain.com) because I don't think you can have two subdomains in one time... (sub1.sub2.domain.com) and that is what that is doing...

You can get around that by making one subdomain with a period between two words (my.poems.profile.com)... (At some hosts at least anyway).

You can stack subdomains 127 levels. Most host have apache (or what ever they are using) configured so it automaticly include the www subdomain.

Well, that's now what I read on some sites... I've actually read a ticket on some hosting company's knowledge base about one user asking how to have a subdomain work with www. in front and they told that user to simply create a subdomain with a www. in front of it by default...

Now that I talk about this, that domain is WebFaction, and they don't use cPanel. And I don't really know how their Apache is set up (or what ever they are using).

So what happens if you have a domain like Bogey says with periods ... like "example.this.is.one.of.them.com" and then someone has "this.is.one.of.them.com" and wants to add the subdomain "example"?

well you buy the second level domain on .com domains, you buy the third level domain on co.uk domains. So you can't buy "example.this.is.one.of.them.com" you buy "them.com" so the person with "example.this.is.one.of.them.com" already owns "this.is.one.of.them.com", go to godaddy and try to buy a domain with periods in it other than the extending tld

@bogey, thats just how webfaction is set up, but each level of a domain is seperated by a period.

I get it ... I think

If you really wanted too you could buy a domain and sell sub domains off it, all you would need to do is set up dns forwarding.

It works a lot like a file path, but going in the oppisite direction, and it uses a dot separator instead of forward slashes.

Kind of makes you wonder why it was structured in reverse...

http://com.ozzu.www/forums.html