The name server serves as command central between clients and the server hosts. It
maintains a list
of the domains associated with each SPD Server host. Client sessions can connect to
a host only through the name server. Direct
connections between clients and hosts are not permitted. The name server resolves
the submitted
domain name to a physical path and then connects you to the server that serves the domain
without requiring you to know physical addresses. A server administrator sets up the
server domains in a
parameter file for the server, which then registers its domains with the name server.