多选题Which two statements are true by default of a multilevel IS-IS network?（）ALevel 1 only routers see routes contained in their area.BLevel 1 routers route towards Level 2 routers due to the attached bit.CLevel 2 routers route towards Level 1 routers due
题目
多选题
Which two statements are true by default of a multilevel IS-IS network?（）
A
Level 1 only routers see routes contained in their area.
B
Level 1 routers route towards Level 2 routers due to the attached bit.
C
Level 2 routers route towards Level 1 routers due to the attached bit.
D
Level 2 routers can see routes in other Level 2 areas and routes originated in Level 1 areas.
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