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Open Shortest Path First
"первыми открываются кратчайшие маршруты", протокол предпочтения кратчайшего пути, протокол OSPF
протокол маршрутизации, по которому на основе поддерживаемой OSPF топологической базы данных для передачи пакета первыми открываются кратчайшие маршруты. Стандартный сетевой протокол для маршрутизаторов сети Internet. Основан на алгоритме SPF
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Open Shortest Path First (OSPF) is a routing protocol for Internet Protocol (IP) networks. It uses a link state routing (LSR) algorithm and falls into the group of interior gateway protocols (IGPs), operating within a single autonomous system (AS).
OSPF gathers link state information from available routers and constructs a topology map of the network. The topology is presented as a routing table to the Internet Layer for routing packets by their destination IP address. OSPF supports Internet Protocol Version 4 (IPv4) and Internet Protocol Version 6 (IPv6) networks and supports the Classless Inter-Domain Routing (CIDR) addressing model.
OSPF is widely used in large enterprise networks. IS-IS, another LSR-based protocol, is more common in large service provider networks.
Originally designed in the 1980s, OSPF is defined for IPv4 in protocol version 2 by RFC 2328 (1998). The updates for IPv6 are specified as OSPF Version 3 in RFC 5340 (2008). OSPF supports the Classless Inter-Domain Routing (CIDR) addressing model.