> A PXE-compatible client sends a DHCP request on boot, to which the network's DHCP server responds with the IP address of a server to netboot from. Specifical

> A PXE-compatible client sends a DHCP request on boot, to which the network's DHCP server responds with the IP address of a server to netboot from. Specifically there are particular DHCP options (66, 67) that tell the client about this, and the client software (PXE) understands them: * https://datatracker.ietf.org/doc/html/rfc2132 https://datatracker.ietf.org/doc/html/rfc2132 * https://www.iana.org/assignments/bootp-dhcp-parameters/bootp-dhcp-parameters.xhtml https://www.iana.org/assignments/bootp-dhcp-parameters/bootp... * https://www.iana.org/assignments/dhcpv6-parameters/dhcpv6-parameters.xhtml https://www.iana.org/assignments/dhcpv6-parameters/dhcpv6-pa... (RFC 5970) And while the options previously were interpreted for TFTP use, newer PXE software now understands the use of "http[s]://" in the file name and use that instead of TFTP.