Name Hierarchy (Cont)
Name space is not related to physical interconnection, e.g., ecse.rpi.edu and ipl.rpi.edu could be on the same floor or in different cities
Geographical hierarchy is also allowed, e.g., cnri.reston.va.us
A name could be a subdomain (eg: ecse.rpi.edu) or an individual object (eg: cortez.rpi.edu)