PXE is Preboot Execution Environment. It is an environment allows computer such as your server to boot from the Network interface card instead of computer storage device. (i.e. hard disk, RAID)
In Cybercon, we created a PXE environment to allow some of our clients to install Operating System to their server with ease. Forget about downloading ISO files or burning a CD/DVD disc. Just boot the server from the server network interface, access the Operating System Installation area via the Menu system and select Operating System you like to install.