Its status is recommended . LANs make it possible to use diskless hosts as workstations, routers, terminal concentrators and so on.
Diskless hosts require a mechanism to boot remotely over a network.
It allows a minimum IP protocol stack with no configuration information, typically stored in ROM, to obtain enough information to begin the process of downloading the necessary boot code. If the client does not know its own IP address, it uses 0.0.0.0. The UDP port number is 67. The server receives the datagram and looks up the hardware address of the client in its configuration file, which contains the client's IP address. The server fills in the remaining fields in the UDP datagram and returns it to the client using UDP port 68.