PXE network boot is an environment for booting computers using a network interface independently of available data storage devices (such as hard disks) or installed OS. No boot media is required on the client system. With PXE, you can install an OS on an x86-based client over the network by using DHCP.
Refer to the booting with PXE instructions in the Booting a System From the Network in Booting and Shutting Down Oracle Solaris 11.3 Systems.