Comprehensive and Detailed In-Depth Explanation:
Internal Router (IR): A router that exists entirely within asingle OSPF area(e.g., Area 0). It doesnot have to be a Border Router (BR).
Area Border Router (ABR): A router that connectstwo or more OSPF areas. It maintains separate LSDBs for each area and forwardssummary LSAsbetween them.
Autonomous System Boundary Router (ASBR): A router that connects the OSPF domain to anexternal network(e.g., BGP, another OSPF AS).
The statement isfalsebecause:
AnIR in Area 0 does not have to be a BR(Border Router). It can just be a normal internal router.
AnASBR does not have to be an ABR. An ASBR can existinside any OSPF area, even a single area, without needing to connect multiple areas.
????Reference:Huawei HCIA-Datacom Study Guide, OSPF Router Types and Area Concepts.
Submit