OSPF preguntas y respuestas de entrevista
Pregunta 16. Explain OSPF virtual links.
Virtual links are used to connect non-backbone areas to the OSPF backbone area (Area 0) when a physical connection is not feasible.
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Pregunta 17. What is OSPF NSSA (Not-So-Stubby Area)?
NSSA is an OSPF area type that allows injection of external routes while still maintaining some stub area characteristics.
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Pregunta 18. How does OSPF handle Type 1 and Type 2 LSAs?
Type 1 LSAs represent routers within an area, and Type 2 LSAs represent networks. OSPF routers use these LSAs to build the LSDB.
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Pregunta 19. What is OSPF graceful restart?
OSPF graceful restart allows a router to temporarily suspend OSPF routing while still forwarding traffic. It is useful during software upgrades or restarts.
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Pregunta 20. Explain OSPF path selection criteria.
OSPF selects paths based on the OSPF metric (cost). Lower cost paths are preferred. If costs are equal, the router considers other tie-breaker criteria.
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