NIS+ is the enterprise naming service in the Solaris environment. It provides a scalable and secure information base for host names, network addresses, and user names. NIS+ makes administration of large, multivendor client/server networks easier by being the central point for adding, removing, and relocating network resources. Changes made to the NIS+ information base are automatically and immediately propagated to replica servers across the network. This propagation ensures that system uptime and performance are preserved. Security is integral to NIS+. Unauthorized users and programs are prevented from reading, changing, or destroying naming service information.