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單項選擇題

Which of the following technologies was created to reduce cost， increase cable length， and uses 3.3v across the line？（）

A. Wide-Ultra2 SCSI-3
B. High-Voltage Differential
C. Low-Voltage Differential
D. Fibre Channel

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Which of the following backup methodologies is MOST time efficient for backing up data？（）

A.Incremental
B.Snapshot
C.Differential
D.GFS

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Which of the following is an appropriate reason for adjusting the SNMP thresholds？（）

A. To eliminate excessive alerts
B. To increase the number of threads
C. To monitor use of VPN traffic
D. To allow more email to come through

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