单项选择题
A. Port mirroring B. VPN C. Trunking D. Port authentication
A link light on a switch is an example of which of the ...
单项选择题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
In order for computers with private IP addresses to acc...
单项选择题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
A SONET network typically uses which of the following t...
单项选择题A SONET network typically uses which of the following transmission media?（）
A. Single-mode fiber B. Multimode fiber C. Copper D. Wireless
