: Why sometimes URLs are reached without the "www"'s in the url? Possible Duplicate: What does WWW do? The usual form of an internet adress is for example http://www.example.com. Sometimes

@Jamie184

The reason is this:

The domain is discoplus.de
Anything before that:

service.discoplus.de,
mail.discoplus.de, discoplus.de

are subdomains. This allows multiple resources under the same domain. A subdomain may even be close to public. Like on a intranet.

For practical reasons nowadays most web servers are configured to redirect domain.com and domain.com to same place. So it may look like they are the same but in fact they are just separate addresses both pointing to a single address.

When you type wwwservice.discoplus.de/ you are being redirected probably becuase that URL doesnt exist you are redirected to a starting page.

The orther thing is the protocol.

when its it refers to HyperText Transfer Protocol which is a standart protocol for web pages. if it has an "s" like this means its secure* and the data being transferred is encrypted.

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@Karen161

A URL is composed of [Protocol]vmapp.org[Folder and File Structure]

The part you're asking about is the domain part, ans domains have a few rules. But trying to keep it simple, the normal www in websites represents a particular machine (the web server) and is not mandatory, but its only supported if explicit in the DNS structure od the domain.

More info here

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