The NIS, NIS+, or DNS name services maintain network databases on several servers on the network. Solaris Naming Setup and Configuration Guide fully describes these name services and explains how to set them up. It also explains the "namespace" and "administrative domain" concepts in complete detail. If you are changing name services from NIS to NIS+, refer to NIS+ Transition Guide. You should refer to these manuals to help you decide whether to use these name services on your network.