invisible.xbm Ok, computers can be referred to by either their FQDN or their Internet address. How can one user be expected to remember them all?
They aren't. The Internet is designed so that one can use either
method. Since humans find it much more natural to deal with words
than numbers in most cases, the FQDN for each host is mapped to its
Internet number. Each domain is served by a computer within
that domain, which provides all of the necessary information to go
from a domain name to an IP address, and vice-versa. For example,
when someone refers to
Rarely will a user have to remember the Internet number of a site (although often you'll catch yourself remembering an apparently obscure number, simply because you've accessed the system frequently). However, you will remember a substantial number of FQDNs. It will eventually reach a point when you are able to make a reasonably accurate guess at what domain name a certain college, university, or company might have, given just their name.
Copyright © 1998, Software Engineering Laboratory
National Technical University of Athens