问题
多项选择题
以下关于OSPF骨干区域的描述正确的是（）.
A.骨干区域号的AreaID是0.0.0.0
B.所有区域必须与骨干区域相连
C.骨干区域负责在非骨干区域之间发布由ABR汇总的路由信息
D.每个区域边界路由器ABR连接的区域中至少有一个是骨干区域
答案
参考答案：A, B, C, D
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以下关于OSPF骨干区域的描述正确的是（）.
A.骨干区域号的AreaID是0.0.0.0
B.所有区域必须与骨干区域相连
C.骨干区域负责在非骨干区域之间发布由ABR汇总的路由信息
D.每个区域边界路由器ABR连接的区域中至少有一个是骨干区域
参考答案：A, B, C, D
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