An internet address such as http://www.computerhilfen.com is composed as follows: First of all the protocol (can be left out while surfing): http://

Other than HTTP, there are for example the FTP and IRC protocol.

After protocol and "www" follows the domain name computerhilfen. It is separated with a dot from the top-level-domain.
A distinction is drawn between "Generic Top Level Domains" (gTLD) like .com, .net and .org and country-specific domains like .de or .at ("Country Code Top Level Domain" - ccTLD).

Alphabetical list of TLDs






Top Level Domain im deutschen Lexikon
Top Level Domain in het nederlandse encyclopedie