MIT
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... +--------+------------------+---------------+--------+
| | | | |
UCI MIT | UDEL YALE
| ISI
| |
...
... root domain has three immediate subdomains: MIL,
EDU, and ARPA. The LCS.MIT.EDU domain has one immediate subdomain named
XX.LCS.MIT ...
... MIT.EDU domain has one immediate subdomain named
XX.LCS.MIT.EDU. All of the leaves are also domains.
...
... domain space, suppose we wanted separate administrative
control for the root, MIL, EDU, MIT.EDU and ISI.EDU zones. We might
allocate name servers as follows:
...
... +--------+------------------+---------------+--------+
| | | | |
UCI MIT | UDEL YALE
|(XX.LCS.MIT.EDU, ISI
...
... |(XX.LCS.MIT.EDU, ISI
|ACHILLES.MIT.EDU) |(VAXA.ISI.EDU,VENERA.ISI.EDU,
+---+---+ | A.ISI.EDU)
| | |
...