Comparer des méthodes

	Protocole de passerelle frontalière (BGP)	Open Shortest Path First (OSPF)	Réseau défini par logiciel (SDN)
Domaine	Télécommunications	Télécommunications	Télécommunications
Famille	Process / pipeline	Process / pipeline	Process / pipeline
Année d'origine	1989	1998	2008
Auteur d'origine	IETF Routing Protocols Working Group	John Moy	Nick McKeown et al.
Type	path-vector routing protocol	link-state routing protocol	programmable network paradigm
Source fondatrice	Rekhter, Y., Li, T., & Hares, S. (2006). A Border Gateway Protocol 4 (BGP-4). RFC 4271.	Moy, J. T. (1998). OSPF Version 2. RFC 2328.	McKeown, N., Anderson, T., Balakrishnan, H., et al. (2008). OpenFlow: enabling innovation in campus networks. ACM SIGCOMM Computer Communication Review, 38(2), 69-74.
Alias	exterior gateway protocol, inter-domain routing	link-state routing, intra-domain routing	network virtualization, programmable networks
Apparentées	2	2	4
Résumé	BGP is the de facto standard routing protocol for interconnecting autonomous systems (ASs) on the Internet. Since its introduction in 1989, BGP has scaled the Internet to millions of routers and trillions of destinations. BGP is path-vector-based, using a flexible policy system to control route propagation and selection. While BGP convergence can be slow and policies complex, it remains the only viable protocol for Internet-scale inter-domain routing.	OSPF is a link-state interior gateway protocol (IGP) for routing within an autonomous system. Introduced by John Moy in 1998, OSPF converges faster than distance-vector protocols and supports equal-cost multipath (ECMP). It remains widely deployed in enterprise and ISP networks for intra-domain routing, though IS-IS is increasingly preferred in large backbones.	Software-Defined Networking (SDN) is a network architecture paradigm that decouples the control plane (routing decisions) from the data plane (packet forwarding). Introduced by McKeown et al. (2008) with OpenFlow, SDN enables network programmability by centralizing control logic in software-based controllers that direct forwarding behavior of simple programmable switches. SDN has transformed network operations, enabling rapid service deployment, traffic engineering, and cloud integration. It is now foundational in data centers and service provider networks.