I am having troubles understanding the information provided by the LSA Type 1 and 2.
In the CCNA 200-301 book it is said that the LSA type 1 is used by to describe the generating router. And the type 2 is used to describe a network with a DR.
In the CCNP ENARSI is it said that the LSA Type 1 is used to advertise the network known by the generating router within the area and the Type 2 is used by the DR to indicate the routers that are connected to the multi-access link.
LSA Type 1 (Router LSA) packets are sent between routers within the same area of origin and do not leave the area. An OSPF router uses LSA Type 1 packets to describe its own interfaces but also carries information about its neighbors to adjacent routers in the same area.
LSA Type 2 – OSPF Network LSA
LSA Type 2 (Network LSA) packets are generated by the Designated Router (DR) to describe all routers connected to its segment directly. LSA Type 2 packets are flooded between neighbors in the same area of origin and remain within that area.