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 OSes. 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 Oracle Solaris 11 Installation Guide: Network-Based Installations at: