225.225.12.38
This form, called "dotted decimal," is still required by some computers. But, to make IP addresses easier for humans, this telephone number has another form which is easier to remember:
hoople.usnd.edu
This means that computer ("node") named "hoople" is located at the University of Southern North Dakota. The last component, ".edu", means that the institution is in the educational domain. . Other domain names look like this:
.edu : educational institutions
.gov : government (research laboratories and
.com : commercial businesses
.org : nonprofit organizations
.mil : military installations
In addition to these domain names, there are many two-letter country codes, e.g.