iPXE is an open-source network boot firmware that allows computers to boot from a network interface. It extends the capabilities of traditional PXE (Preboot Execution Environment) by enabling booting from various protocols, including HTTP, iSCSI, and FTP. This flexibility makes it useful for deploying operating systems and applications over a network. With iPXE, users can create custom boot scripts and configurations, making it easier to manage large-scale deployments. It supports a wide range of hardware and can be integrated with cloud services, enhancing its utility in modern IT environments.