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單項選擇題

An IS-IS router is adjacent to and passing traffic with a neighbor. You perform a show is interface detail command and notice that for some interfaces you have a circuit type of 3. Which IS-IS level（s） is enabled on these interfaces？（）

A.Level 1 only
B.Level 2 only
C.Level 1 and Level 2
D.Level 3 only

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單項選擇題

Which of the following multicast mode does Auto-RP require？（）

A.Link-mode
B.Dense mode
C.Sparse mode
D.Sparse-dense mode

多項選擇題

Which two are default preference values for both internal and external IS-IS Level 2 routes on a Juniper Networks router？（）

A.10
B.15
C.18
D.150
E.160
F.165

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