問題文
A data center OSPF domain has grown large enough that the operators divide it into a backbone area and several other areas. Which statement describes what a router placed on the boundary between two of those areas does?
選択肢
- It floods the detailed link state records of each area into every other area, and recalculates the topology for the routers that sit in those areas.
- It keeps the detailed link state records in each area inside that area, and advertises the reachability of the prefixes it learned there into the other area.
- It runs the shortest path calculation for the whole domain inside one process, and advertises the resulting routes to the routers that sit in the areas it connects.
- It converts the link state records of each area into updates that carry only a distance, and advertises those updates into the other area for the prefixes it learned there.