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【单选题】
You have a Level 1-only router （Router A） in IS-IS area 49.0001. How does Router A learn how to get to IP prefixed in other areas？（）
A.
Router A must have a Level 2 adjacency with the Level 1/Level 2 router in area 49.0001.
B.
The Level 1/Level 2 router in area 49.0001 sets the "attached" bit in the Level 2 LSP it floods into area 49.0001.
C.
The Level 1/Level 2 router in area 49.0001 sets the "attached" bit in the Level 1 link-state PDU （LSP） it floods into area 49.0001.
D.
The Level 1/Level 2 router in area 49.0001 advertises these prefixed into area 49.0001 using a Level 2 LSP it floods into the area.
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Because the furniture they get in this way is new.
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too weak
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A.
Because the furniture they get in this way is new.
B.
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Because it saves them much trouble and money.
D.
Because they can always get better quality furniture in this way.
查看完整题目与答案
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very weak
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