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((Short description|Automatic detection of devices and services on a computer network))
((About|a type of network protocols|the multimedia session initiation protocol|Session Description Protocol))
((multiple issues|
((prose|date=June 2014))
((ref improve|date=June 2014))
))

'''Service discovery''' is the process of automatically detecting devices and services on a [[computer network]]. It aims to reduce the manual configuration effort required from users and administrators. A '''service discovery protocol''' ('''SDP''') is a [[network protocol]] that helps accomplish service discovery. 

Service discovery requires a common language to allow software agents to make use of one another's services without the need for continuous user intervention.<ref>((cite journal|accessdate=2008-03-13|url=http://www.sciam.com/article.cfm?articleID=00048144-10D2-1C70-84A9809EC588EF21| title=The Semantic Web  |journal=[[Scientific American]]|date=2001-05-01|author=Berners-Lee, Tim |volume = 284|issue = 5|pages = 34–43|doi = 10.1038/scientificamerican0501-34 |bibcode = 2001SciAm.284e..34B| url-access=subscription))</ref>

==Protocols==
There are many service discovery protocols, including:
* [[Bluetooth]] [[Bluetooth_protocols#Service_discovery_protocol_.28SDP.29|Service Discovery Protocol (SDP)]]
* [[DNS-SD|DNS Service Discovery]] (DNS-SD), a component of [[zero-configuration networking]]
* [[DNS]], as used for example in [[Kubernetes#Services|Kubernetes]]
* [[Dynamic Host Configuration Protocol]] (DHCP)
* [[Internet Storage Name Service]] (iSNS)
* [[Jini]] for [[Java (programming language)|Java]] objects.
* [[Lightweight Service Discovery]] (LSD), for mobile ad hoc networks <ref>((Cite conference |last1= Lim |first1= Byong-In |last2= Choy |first2= Kee-Hyun |last3= Shin |first3= Dong-Ryeol |date= 2005 |editor-last= Sunderam |editor-first= V.S. |editor-last2= van Albada |editor-first2= G.D. |editor-last3= Sloot |editor-first3= P.M.A. |editor-last4= Dongarra |editor-first4= J. |title= An Architecture for Lightweight Service Discovery Protocol |conference= International Conference on Computational Science |publisher= Springer Berlin Heidelberg |pages= 963–966 |doi= 10.1007/11428862_148 |isbn= 978-3-540-32118-7 |doi-access= free ))</ref>
* [[Link Layer Discovery Protocol]] (LLDP) standards-based neighbor discovery protocol similar to vendor-specific protocols which find each other by advertising to vendor-specific broadcast addresses (versus all-1's), such Cabletron (Enterasys) and Cisco Discovery Protocol (both referred to as CDP but different formats). 
* [[Local Peer Discovery]], or Local Service Discovery
* [[Multicast Source Discovery Protocol]] (MSDP), usually used for unicast exchange of multicast source information between anycast Rendez-Vous Points (RPs) to service mcast clients. 
* [[Service Location Protocol]] (SLP)
* [[Session Announcement Protocol]] (SAP) used to discover [[Real-time Transport Protocol|RTP]] sessions
* [[Simple Service Discovery Protocol]] (SSDP), a component of [[Universal Plug and Play]] (UPnP)
* [[Universal Description Discovery and Integration]] (UDDI) for [[web service]]s
* [[Web Proxy Autodiscovery Protocol]] (WPAD)
* [[WS-Discovery]] (Web Services Dynamic Discovery)
* [[Extensible Messaging and Presence Protocol|XMPP]] Service Discovery ([http://xmpp.org/extensions/xep-0030.html XEP-0030])
* [[XRDS|XRDS (eXtensible Resource Descriptor Sequence)]] used by [[XRI]], [[OpenID]], [[OAuth]], etc.

== See also ==
* [[Discoverability]]
* [[Semantic web]]

== References ==
((reflist))

==External links==
* [http://www.s-cube-network.eu/km/terms/s/service-discovery Service Discovery] S-Cube Knowledge Model
* Dong, H., Hussain, F.K., Chang, E.: [https://www.researchgate.net/publication/260329617_Semantic_Web_Service_matchmakers_State_of_the_art_and_challenges Semantic Web Service matchmakers: State of the art and challenges][Online]. Concurrency and Computation: Practice and Experience 25(7) (May 2013) pp. 961–988. Accessed on June 16, 2015.
* Sun, L., Dong, H., Hussain, F.K., Hussain, O.K., Chang, E.: [https://www.researchgate.net/publication/265169908_Cloud_service_selection_State-of-the-art_and_future_research_directions Cloud service selection: State-of-the-art and future research directions. Journal of Network and Computer Applications][Online] 45 (October 2014) pp. 134–150. Date accessed: 16 June 2015.

((DEFAULTSORT:Service Discovery))
[[Category:Internet protocols]]
[[Category:Application layer protocols]]
[[Category:Computer configuration]]
[[Category:Service-oriented (business computing)]]

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