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單項(xiàng)選擇題

Which component should you use to reduce collision issues on a large LAN?（）

A.Host
B.Switch
C.Printer
D.Repeater

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單項(xiàng)選擇題

In the 7-layer OSI model, which layer switching will take place?（）

A.Layer one
B.Layer two
C.Layer three
D.Layer four

單項(xiàng)選擇題

Which device is used in wireless networks to send transmissions to a target area?（）

A.Optical fiber
B.Access point
C.Directional antenna
D.Omni-directional antenna

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