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單項選擇題

You have 50 subscribers accessing a LAC to connectto ISP1.com.What is the L2TP Control Connections and Sessions for the subscribers?()

A.A single Control Connection and a single Session
B.A single Control Connection and multiple Sessions(one pers ubscriber)
C.Multiple Control Connections and a single Session
D.Multiple Control Connections and multiple Sessions(one per subscriber)

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