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單項選擇題

Which of the following WAN technologies modulates 24 channels into a 1 5Mbps signal?（）

A.ISDN
B.PSTN
C.OC-2
D.T1

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單項選擇題

Which of the following ping parameters will set the size of the outgoing packet?（）

A.–c
B.i
C.R
D.–s

單項選擇題

On which of the following cables would a technician find a BNC connector installed?（）

A.CAT6
B.RG-6
C.Fiber
D.CAT3