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Which design improvement would help?

Refer to the exhibit.

The routing switches shown in the exhibit use OSPF, and all of their interfaces are in Area 1. A faulty link on Switch-1 went up and down many times over the course of several hours. This caused link state updates (LSUs) to flood all of the routing devices in the OSPF AS and reduce performance. The network administrator fixed the faulty link on Switch-1, but the administrator also wants to mitigate the effects if a similar issue occurs in the future.

Which design improvement would help?
A . Configure Area 1 as a stub area on all routers except Switch-2, Switch-3, and Switch-4
B . Divide the AS into different areas, and aggregate routes between them
C . Divide the AS into different areas, and configure the backbone area as an NSSA
D . Decrease the LSA generation timer, and make sure to set the same value on all routers

Answer: B

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