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單項(xiàng)選擇題

Which of the following WAN protocols is a packet switching technology?（）

A.Frame Relay
B.POTS
C.PSTN
D.ISDN

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單項(xiàng)選擇題

Using network monitoring tools would allow an administrator to do which of the following?（）

A. Configure offline devices
B. Examine performance issues
C. Install additional software and updates
D. View syslog events

單項(xiàng)選擇題

Determining when to retransmit frames is an example of which of the following Ethernet properties?（）

A. Carrier sense
B. Collision detection
C. Multiple access points
D. Collision avoidance

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