A. Backbone Summary: an LSA sent by the backbone router to all the OSPF areas.

B. Default LSA: an LSA generated by the ASBR. These LSAs are used to propagate default route into OSPF.

C. DR Summary LSA: an LSA sent by the DR router to all the other routers on network.

D. As Internal LSA: an LSA generated by the ASBR. AS Internal LSAs are flooded only within the autonomous system.

E. Router LSA: an LSA sent by every router. This LSA includes the state the cost of all links and a list of all OSPFv2 neighbors on the link.

F. Opaque LSA: an LSA used to extend OSPF.

G. Network LSA: an LSA sent by the DR. This LSA lists all routers in the multi-access network.