Which three statements describe the reasons large OSPF networks use a hierarchical design? (Choose three.)

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Which three statements describe the reasons large OSPF networks use a hierarchical design? (Choose three.)

to confine network instability to single areas of the network.
to reduce the complexity of router configuration
to speed up convergence
to lower costs by replacing routers with distribution layer switches
to decrease latency by increasing bandwidth
to reduce routing overhead

Explanation: Hierarchical design of OSPF (basically means that you can separate the larger internetwork into smaller internetworks called areas) helps us create a network with all features listed above (decrease routing overhead, speed up convergence, confine network instability to single areas of the network).

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