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Refer to the exhibit. A user from Area-55 cannot access the HTTPS services running on the Area- 0 server farm. An engineer identifies that the routing table of SW-1 is not learning the Area-55 routes. Which configuration resolves this issue?
Correct Answer: D
In OSPF, all non-backbone areas (non-Area 0) must have a direct connection to Area 0, either physically or logically through a virtual link. In this topology: - Area 55 connects to Area 9 through R3 → R2. - Area 9 connects to Area 0 through R2 → R1. - However, Area 9 is not directly connected to Area 0, and there's no virtual link configured. As a result, Area 55 routes are not being advertised to Area 0, and SW1 doesn't learn the routes to reach the user in Area 55. To resolve this, a virtual link between R2 and R1 through Area 9 is needed. This logically connects Area 9 to Area 0, allowing OSPF to pass routing information between them. The virtual link must be configured using router IDs of R1 and R2 (1.11.1.1 and 1.12.1.1), and Area 9 as the transit area.