Which statement is true about OSPF Network LSAs?
A.
They are originated by every router in the OPSF network. They include all routers on the link,
interfaces, the cost of the link, and any known neighbor on the link.
B.
They are originated by the DR on every multi-access network. They include all attached routers
including the DR itself.
C.
They are originated by Area Border Routers and are sent into a single area to advertise
destinations outside that area.
D.
They are originated by Area Border Router and are sent into a single area to advertise an
Autonomous System Border Router.
Explanation:
The point of this question is OSPF Network LSAs
The feature of OSPF Network LSAs is that they are generated by DR, and DR only exist on multiaccess network, the use of OSPF Network LSAs is that it list all neighbors around and send it to
every router which run OSPF.
Only B is Correct
LSA Type Description Details
1 Router LSA Generated by all routers in an area to describe their directly attached links
2 Network LSA Advertised by the DR of the broadcast network (does not cross ABR)
3 Summary LSA Advertised by the ABR of originating area
4 Summary LSA Generated by the ABR of the originating area to advertise an ASBR to all other areas in the autonomous system
5 AS external LSA Used by the ASBR to advertise networks from other autonomous systems
7 Defined for NSSAs Generated by an ASBR inside a Not-so-stubby area (NSSA) to describe routes redistributed into the NSSA