eli5: what is link and link state id in ospf?

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eli5: what is link and link state id in ospf?

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Links are network connections between two or more routers.
OSPF doesn’t know or care about Ethernet, so if you have several routers plugged into AJ Ethernet switch, OSPF thinks they’re all connected to each other and calls it one link..

Link state sdvertisements (LSAs) are information packets that OSPF passes around the network so all the routers know about all the other routers, links and areas (not just the links).

Don’t know about link state ID, but an LSA ID is an ID number each LSA has, so that a newer LSA with the same ID can replace it, or delete the older one. The ID number being the same tells the routers it’s a new version of the same LSA, not a new LSA.