问题：
[多选题]Which two design recommendations are most appropriate when OSPF is the data center core routing protocol？ （）
A、 Never use passive interfaces.
B、 Use NSSA areas from the core down.
C、 Use totally stub areas to stop type 3 LSAs.
D、 Use the lowest Ethernet interface IP address as the router ID.
E、 Tune OSPF timers to enable OSPF to achieve quicker convergence
参考答案：
B| E
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