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單項選擇題

Running both IPv4 and IPv6 on a router simultaneously is known as what?（）

A.4to6 routing
B.6to4 routing
C.binary routing
D.dual-stack routing
E.NextGen routing

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單項選擇題

What is the default maximum number of equal-cost paths that can be placed into the routing of a cisco OSPF router?（）

A.16
B.2
C.unlimited
D.4

多項選擇題

Which two states are the port states when RSTP has converged？（）

A.blocking
B.learning
C.disabled
D.forwarding
E.listening

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