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單項選擇題

1000BaseT has a MAXIMUM run distance of:（）

A. 25 meters (82 feet)
B. 100 meters (328 feet)
C. 500 meters (1640 feet)
D. 1000 meters (3280 feet)

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Which of the following features is essential in a firewall if it is to support RTP sessions?（）

A. Remote console
B. Statefulness
C. Address translation
D. Zones

單項選擇題

A layer 3 switch can move packets between subnets based on which of the following criteria?（）

A. 802.1q tag
B. Port
C. Application
D. IP address

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