The proper terminology for a site's domain name (somewhere.domain
above) is its Fully Qualified Domain Name (FQDN). It is usually
selected to give a clear indication of the site's organization or
sponsoring agent. For example, the Massachusetts Institute of
Technology's FQDN is mit.edu; similarly, Apple Computer's domain name
is apple.com. While such obvious names are usually the norm, there
are the occasional exceptions that are ambiguous enough to
mislead---like vt.edu, which on first impulse one might surmise is an
educational institution of some sort in Vermont; not so. It's
actually the domain name for Virginia Tech. In most cases it's
relatively easy to glean the meaning of a domain name---such
confusion is far from the norm.