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| Servizi Differenziati (DiffServ)× | Border Gateway Protocol (BGP)× | Open Shortest Path First (OSPF)× | |
|---|---|---|---|
| Campo | Telecomunicazioni | Telecomunicazioni | Telecomunicazioni |
| Famiglia | Process / pipeline | Process / pipeline | Process / pipeline |
| Anno di origine≠ | 1998 | 1989 | 1998 |
| Ideatore≠ | IETF DiffServ Working Group | IETF Routing Protocols Working Group | John Moy |
| Tipo≠ | QoS architecture | path-vector routing protocol | link-state routing protocol |
| Fonte seminale≠ | Blake, S., Black, D., Carlson, M., et al. (1998). An Architecture for Differentiated Services. RFC 2475. link ↗ | Rekhter, Y., Li, T., & Hares, S. (2006). A Border Gateway Protocol 4 (BGP-4). RFC 4271. link ↗ | Moy, J. T. (1998). OSPF Version 2. RFC 2328. link ↗ |
| Alias | quality of service, QoS architecture | exterior gateway protocol, inter-domain routing | link-state routing, intra-domain routing |
| Correlati≠ | 3 | 2 | 2 |
| Sintesi≠ | DiffServ is a QoS architecture providing scalable, class-based service differentiation in networks. Introduced by IETF (1998), DiffServ marks packets with a Differentiated Services Code Point (DSCP) in the IP header, enabling routers to apply per-hop-behaviors (PHBs) based on markings. Unlike IntServ (which reserves resources per-flow), DiffServ is stateless and scalable to Internet scale. DiffServ remains the primary QoS mechanism in ISP and enterprise networks. | 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. |
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