2. More loosely, any network address reachable through Internet; this includes bang path addresses and some internal corporate and government networks.
Reading Internet addresses is something of an art. Here are the four most important top-level functional Internet domains followed by a selection of geographical domains:
Note that most of the sites in the com and edu domains are in the U.S. or Canada.
Within the us domain, there are subdomains for the fifty states, each generally with a name identical to the state's postal abbreviation. Within the uk domain, there is an ac subdomain for academic sites and a co domain for commercial ones. Other top-level domains may be divided up in similar ways.