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【多选题】
在OSPF协议中，对于指定路由器Designated Router的描述，下列哪些描述是正确的。（）A.
DR不是人为指定的，而是由本网段中所有的路由器共同选举出来的
B.
若两台路由器的优先级值不同，就选择优先级值较小的路由器作为DR
C.
DR选举时，若两台路由器的优先级值相等，则选择Router ID大的路由器作为DR
D.
网段中的DR一定是优先级数值最大的路由器
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A.
had he closed
B.
he had closed
C.
did he close
D.
he closed
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B.
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D.
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A.
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B.
按PgDn键
C.
用鼠标单击当前幻灯片
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按Enter键
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B.
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