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Preboot execution environment (PXE), pronounced as "pixie," allows computers to boot up remotely through a network interface. PXE enables a client machine to boot from a server independent of the hard disks and installed operating system.
PXE was introduced as a component in the Wired for Management (WfM) framework by Intel in 1999. Intel’s WfM has now been superseded by Active Management Technology, but PXE is still a valuable tool for many network administrators around the world.
This term is also known as pre-execution environment.
Network booting is generally applied in a diskless environment using routers and centrally managed computers, also known as thin clients. Centralized computing environments provide reduced maintenance costs, enhanced security and enhanced control over the system's workstations.
PXE code is generally delivered with computer machines on a ROM chip or a boot disk to enable remote boot and configuration. The process makes use of network protocols such as User Datagram Protocol (UDP), Trivial File Transfer Protocol (TFTP), Internet Protocol (IP) and Dynamic Host Configuration Protocol (DHCP).
Some of the key advantages of PXE are: