多选题Why do large OSPF networks use a hierarchical design？（）Ato confine network instability to single areas of the network.Bto reduce the complexity of router configuration.Cto speed up convergence.Dto lower costs by replacing routers with distribution layer switches.Eto decrease latency by increasing bandwidth.Fto reduce routing overhead.
多选题
Why do large OSPF networks use a hierarchical design？（）
A
to confine network instability to single areas of the network.
B
to reduce the complexity of router configuration.
C
to speed up convergence.
D
to lower costs by replacing routers with distribution layer switches.
E
to decrease latency by increasing bandwidth.
F
to reduce routing overhead.
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