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{{short description|Computer networking protocol}}
The '''Bootstrap Protocol''' ('''BOOTP''') is a
[[Internet Protocol]] networks to automatically assign an [[IP address]] to network devices from a configuration server. The BOOTP was originally defined in
While some parts of BOOTP have been effectively superseded by the [[Dynamic Host Configuration Protocol]] (DHCP), which adds the feature of leases, parts of BOOTP are used to provide service to the DHCP protocol. Some DHCP servers also provide the legacy BOOTP functionality.
When a network-connected computer [[booting|boots]]
BOOTP is implemented using the [[User Datagram Protocol]] (UDP) for transport.
Historically, BOOTP has also been used for [[Unix-like]] [[diskless workstation]]s to obtain the network ___location of their [[boot image]], in addition to the IP address assignment. Enterprises used it to roll out a pre-configured client (e.g., [[Microsoft Windows|Windows]]) installation to newly installed PCs.
Initially requiring the use of a boot [[floppy disk]] to establish the initial network connection, manufacturers of network
==History==
The BOOTP was first defined in September 1985
An increasing set of BOOTP vendor information extensions was defined{{Ref RFC|1048}}{{Ref RFC|1084}}{{Ref RFC|1395}}{{Ref RFC|1497}} to supply BOOTP clients of relevant information about the network, like [[default gateway]], [[Domain name system|name server IP address]], the [[___domain name]], etcetera.
==Operation==▼
With the advent of the [[Dynamic Host Configuration Protocol]], the BOOTP vendor information extensions were incorporated as DHCP option fields,{{Ref RFC|1533}}{{Ref RFC|2132}} to allow DHCP servers to also serve BOOTP clients.
; Case 1: Client and server on same network▼
▲==Operation==
When a BOOTP client is started, it has no IP address, so it broadcasts a message containing its MAC address onto the network. This message is called a “BOOTP request”, and it is picked up by the BOOTP server, which replies to the client with the following information that the client needs:
# The
# The IP address and host name of the BOOTP server.
# The IP address of the server that has the boot image, which the client needs to load its operating system.
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When the client receives this information from the BOOTP server, it configures and initializes its TCP/IP protocol stack, and then connects to the server on which the boot image is shared. The client loads the boot image and uses this information to load and start its operating system.<ref>{{cite web |url=https://networkencyclopedia.com/bootstrap-protocol-bootp/ |title=Bootstrap Protocol (BOOTP) |website=Network Encyclopedia}}</ref>
The Dynamic Host Configuration Protocol (DHCP) was developed as an extension of BOOTP. BOOTP is defined in
# Problem with the bootp request is that the request is broadcast. A [[
# To solve this problem, there is a need for an intermediary (relay).
# One of the host or router can be configured at application layer to operate as relay agent.
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==IETF standards documentation==
*{{Ref RFC|3942|ref=no}}
*{{Ref RFC|2132|ref=no}}
*{{Ref RFC|1542|ref=no}}
*{{Ref RFC|1534|ref=no}}
*{{Ref RFC|951|ref=no}}
==See also==
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* [[Maintenance Operations Protocol]] (MOP)
==References==
{{reflist}}
==External links==
* [http://www.eventhelix.com/RealtimeMantra/Networking/Bootp.pdf BOOTP Sequence Diagram] {{Webarchive|url=https://web.archive.org/web/20150226073404/http://www.eventhelix.com/RealtimeMantra/Networking/Bootp.pdf |date=2015-02-26 }} (PDF)
* [
* [
[[Category:Internet protocols]]
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