top-level domain ![click to hear](/images/speaker.jpg)
Part of the domain name that designates the country of origin or the category of organization (including government agency, commercial business and educational institution).
second-level domain ![click to hear](/images/speaker.jpg)
Part of the domain name that designates the server name.
server ![click to hear](/images/speaker.jpg)
Part of the URL address identifying the type of server. The best known is the Web server (www), which, as its name implies, hosts Web sites.
domain name ![click to hear](/images/speaker.jpg)
Part of the URL address specifically designating the host. It must be registered with a domain name registrar.
communication protocol ![click to hear](/images/speaker.jpg)
Part of the URL address specifying the language used to exchange data. The HTTP protocol, which allows the transfer of Web pages, is the best known.