OSPF (Open Shortest Path First) Router-LSA (Type 1 LSA)describesall directly connected OSPF linksof a router and their types. Thefollowing link types can appear in a Router-LSA:
Point-to-Point (P-2-P) (B)– Represents adirect connection between two routers.
Virtual Link (Vlink) (C)– Used toconnect an area to the backbone (Area 0)when a direct connection is unavailable.
Stub Network (StubNet) (D)– Represents anetwork with only one exit point(e.g., a loopback interface or passive interface).
Incorrect Option:
TransNet (A) – Incorrect!
Transit networks appear in Network LSAs (Type 2), not Router LSAs.
Reference from Huawei HCIE-Datacom Documentation:
Huawei OSPF Configuration Guide – Router-LSAs and Link Types
HCIE-Datacom Training Material – OSPF LSAs and Topology Advertisement
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