Here we have learned about packets of link state and matric calculation of link state and depending on the matric remote network path selection.

Link state's database making method

How OSPF recognize neighbor based on router ID also about loopback interface and it's responsibility and how router ID is chosen.

Also about  point to point communication in routers in OSPF and multiaccess broadcast and how to solve the traffic problem in multiaccess broadcast by making 1 router DR and 1 BDR and others DR others also how DR, BDR, DR others is selected and their responsibility .

At last how OSPF routing is configured in router and if multiple protocol is configured the protocol with lowest administrative distance will be used.