There are two types of systems on which you must install the Solaris software:
Server - A system that provides services and/or file systems, such as home directories or mail files, for other systems on the network. An OS server is a server that provides the Solaris software for other systems on the network. For diskless clients, OS servers provide /usr, root (/), and swap file systems. For AutoClient systems, an OS server provides all system software except the individual root (/) and /usr file systems required for local swapping and caching.