It basically bundles iPXE which allows one to boot over the network including ethernet and I think WiFi although WiFi depends on drivers. It downloads an bootab

It basically bundles iPXE which allows one to boot over the network including ethernet and I think WiFi although WiFi depends on drivers. It downloads an bootable image and chain boots into it. We used in our ML data center to iterate on our NixOS images meaning we could push out updates to the underlying OS and then just trigger a restart via IPMI and make it download the new images. Note that we didn't end up using netboot at the end, we just use iPXE directly.