ISP (Network operator) do they use the OSPF protocol to exchange routing information between routers in Internet?

ISP (network operator) do they use the OSPF protocol to exchange routing information between routers in Internet?

ISP plays a great role in network interconnection, so what protocol does ISP router use for routing information exchange on Internet?

Network computer-network
Nov.03,2021

as needed.

ospf and isis belong to intra-area routing protocols. Suitable for small and medium-sized networks.

bgp belongs to inter-area routing protocol and is used for interconnection of large networks.

choose the right protocol according to the scale and the actual situation.

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