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單項(xiàng)選擇題

Which term describes a spanning-tree network that has all switch ports in either the blocking or forwarding state?（）

A. redundant
B. spanned
C. provisioned
D. converged

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單項(xiàng)選擇題

Which PPP subprotocol negotiates authentication options?（）

A. NCP
B. LCP
C. ISDN
D. DLCI
E. SLIP

單項(xiàng)選擇題

You are working in a data center environment and are assigned the address range 10.188.31.0/23.You are asked to develop an IP addressing plan to allow the maximum number of subnets with as many as 30 hosts each.Which IP address range meets these requirements?（）

A. 10.188.31.0/27
B. 10.188.31.0/26
C. 10.188.31.0/29
D. 10.188.31.0/28
E. 10.188.31.0/25

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