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單項選擇題

A computer’s case fan protects against which of the following environmental concerns?（）

A. Pressure
B. Heat
C. Brown out
D. Cold

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單項選擇題

Which of the following is MOST likely a managed, Layer 3 device?（）

A.Router
B.Bridge
C.Hub
D.Switch

單項選擇題

A user is experiencing headaches and motion sickness symptoms when using their new computermonitor. Which of the following can a technician adjust to help the user?（）

A. Privacy filter
B. Refresh rate
C. Use a digital signal
D. Brightness

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