Which directory service to use

Clearly, LDAP is the future for directory services on all operating systems, including Solaris. However, at the time this tutorial was written, LDAP was only starting to be integrated with operating systems. Windows is the first such offering from Microsoft. Solaris 8 includes a fully integrated LDAP client, but no server. Moreover, LDAP is more complex to administer than other directory services.NIS is perhaps the easiest to administer, but it is also the most limited. It is, however, the universal directory for Unix systems.DNS is the standard for hostnames and addresses, and you'll find it handy for accessing hosts outside your domain.NIS+ has gained some acceptance among other non-Solaris Unix operating systems, including HP's HP-UX, IBM, AIX, and Linux. NIS+ is much more secure than NIS.This rest of this tutorial ignores NIS+ and LDAP, and focuses on NIS and to some degree DNS, since those are what you are most likely to encounter. If you are concerned about security, you'll need to seriously consider deploying NIS+ until LDAP catches up. If security is not a concern, then NIS is fine.