To determine the correct answer, we need to analyze how OSPFv3 handles Router LSAs (Type 1 LSAs) in a simple Area 0 topology like the one shown in the figure.
1. Understanding OSPFv3 Router LSAs (Type 1 LSAs)
Router LSAs (Type 1 LSAs) are generated by each router within an OSPF area to describe its own directly connected links.
Each router in an OSPF area generates exactly one Type 1 LSA.
The Link-State Database (LSDB) on a router contains LSAs from all routers in the same area.
2. Analyzing the Network in the Figure
There are 3 routers: R1, R2, and R3.
All routers are in OSPFv3 Area 0 (which is a single area).
Each of these routers generates one Router LSA (Type 1 LSA).
Since R2 is in the same area as R1 and R3, its LSDB contains the Router LSAs from itself, R1, and R3.
3. Conclusion
The LSDB of R2 contains 3 Router LSAs (one from each router: R1, R2, and R3).
Final Answer: 3
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