System Administration Guide: Naming and Directory Services (DNS, NIS, and LDAP)

Joining the Internet

The Internet root domain, top-level domains, organizational and geographical, are maintained by the various Internet governing bodies. People with networks of any size can “join” the Internet by registering their domain name in either the organizational or the geographical hierarchy.

Every DNS domain must have a domain name. If you use DNS for naming service without connecting to the Internet, you can use any name for the domains and subdomains. However, if your site plans wants to join the Internet, your company must register its domain name with the Internet governing bodies.

To join the Internet, do the following.