OSPFv3 LSA Flooding
Question
Which OSPFv3 LSA is never flooded beyond the link?
Answers
Explanations
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A. B. C. D. E.B.
A router originates a separate Link LSA for each link itis attached to.
These LSAs have link-local flooding scope and are never flooded beyond a link that they are associated with.
References:
The correct answer is B. link LSA.
In OSPFv3, there are several types of LSAs that are used to advertise information about the network topology. Each LSA is flooded throughout the area to which the router belongs, allowing every router in the area to build a complete map of the network topology.
The five types of OSPFv3 LSAs are:
A. Router LSA (Type 1): These LSAs are generated by each router and describe the state of the router's interfaces and the networks that are directly connected to them.
B. Link LSA (Type 8): These LSAs are generated by the Designated Router (DR) on a multi-access network and describe the state of the link to which the DR is attached.
C. Intra-Area Prefix LSA (Type 9): These LSAs are generated by the router and describe the prefixes (network addresses) that are associated with the router's interfaces.
D. Inter-Area Router LSA (Type 3): These LSAs are generated by Area Border Routers (ABRs) and describe the routes to networks that are located in other areas.
E. Network LSA (Type 2): These LSAs are generated by the DR on a multi-access network and describe the routers that are connected to the network.
Of these five types of LSAs, the Link LSA (Type 8) is the only one that is never flooded beyond the link. This means that the information contained in the Link LSA is not shared with routers in other areas, and is only used to help routers in the same area build a complete map of the network topology.
The Link LSA contains information about the state of the link, including the link-local address of the DR, the interface ID of the DR, and the list of router IDs of the routers that are connected to the link. This information is used by routers in the same area to determine the topology of the network, but it is not relevant to routers in other areas.
In summary, the correct answer is B. Link LSA, because this type of LSA is never flooded beyond the link to which it pertains.
