Comprehensive and Detailed In-Depth Explanation:
Understanding OSPFv3 LSA Types
* OSPFv3 uses different LSA types than OSPFv2, with some being similar in function:
* Link-LSA (Type 8): Generated by every router on a link to advertise link-local IPv6 information.
* Intra-Area-Prefix-LSA (Type 9): Advertises IPv6 prefixes within an area.
* Network-LSA (Type 2): Generated only by the Designated Router (DR) to advertise information about all routers on a multi-access network.
* Inter-Area-Prefix-LSA (Type 3): Advertises network prefixes between OSPF areas (generated by ABRs).
Route Distribution Analysis:
A: Inter-Area-Prefix-LSA (Type 3) # (Incorrect)
* Generated by an ABR to advertise prefixes between OSPF areas.
* More than one ABR can generate this LSA.
# Not always generated by only one router.
B: Link-LSA (Type 8) # (Incorrect)
* Each router generates its own Link-LSA for each link it participates in.
* This means multiple routers can generate this LSA.
# Not generated by only one router.
C: Network-LSA (Type 2) # (Correct)
* Generated ONLY by the Designated Router (DR) on a multi-access network (such as an Ethernet link).
* Other routers do not generate this LSA, only the DR does.
# Correct answer: This LSA is generated by only one router (the DR).
D: Intra-Area-Prefix-LSA (Type 9) # (Incorrect)
* Generated by any router to advertise IPv6 prefixes within an area.
* Multiple routers in an area can generate this LSA.
# Not generated by only one router.
Final Conclusion:
# C. Network-LSA (Type 2) is the correct answer because it is generated by only one router-the Designated Router (DR).
Thus, the correct answer is: C. Network-LSA.