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單項(xiàng)選擇題

A link light on a switch is an example of which of the following Ethernet properties?（）

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

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單項(xiàng)選擇題

In order for computers with private IP addresses to access the public Internet, which of thefollowing must the router perform?（）

A.NAT
B.BGP
C.DHCP
D.APIPA

單項(xiàng)選擇題

A SONET network typically uses which of the following transmission media?（）

A. Single-mode fiber
B. Multimode fiber
C. Copper
D. Wireless