IBM LAN Server
IBM LAN Server enables clients (RIPL requesters) to load the operating systems DOS or OS/2 via the 802.2/DLC - protocol from the LAN (often Token Ring). Therefore, the server compares the clients' requests with entries in its RPL.MAP table. Remote booting DOS workstations via boot images was supported as early as 1990 by IBM LAN Server 1.2 via its PCDOSRPL protocol. IBM LAN Server 2.0 introduced remote booting of OS/2 stations (since OS/2 1.30.1) in 1992.
Read more about this topic: Remote Initial Program Load