As you begin to use Internet and locate hosts which support databases or sources you want to access, you may find the address written in either of these two ways. You will also use host addresses when you send someone e-mail . However, to send e-mail to someone, you must tell the host computer which one of its users to send the message to. Userid's may consist of first names, last names, numbers, or even symbols. Domains - Top Unlike userids, domains are a little more uniform in design.
Domains often consist of two or more subdomains, which are separated by periods.
Besides providing you a means to access a certain host, the domain address can give you information about where the host computer is located, and what type of organization supports it. This information can often be gleaned from the subdomains. The subdomains read left to right-from most specific to the more general in the information they provide. This is possible because Web Browsers, like Netscape, can access other types of Internet files other than those designed specifically for the World Wide Web.