多項(xiàng)選擇題What are two appropriate uses for Internet Protocol TV broadcasting (IP/TV) technology? （）

A.Enabling online collaboration among research personnel
B.Delivering a strategic business update from the CEO to all personnel
C.Enabling an interactive virtual classroom for sales personnel in remote locations
D.Delivering information about changes in health benefit enrollment to all personnel


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2.單項(xiàng)選擇題Which benefit does digital subscriber line (DSL) systems for broadband access provide to the user?（）

A.Secure access to company extranet
B.Dedicated lines for high security data transfer
C.Simple solution for high-quality digital video using coaxial cable
D.Data and audio signals that share the same communications infrastructure

3.單項(xiàng)選擇題Which network technology allows for the monitoring of active communication networks to diagnose problems and gather statistics for network administration?（）

A.Network security
B.Content networking
C.Network management
D.Campus local-area networking

5.單項(xiàng)選擇題How does a switch respond when it receives a message?（）

A.It reads the Layer-5 information and sends the message directly to the intended computer.
B.It reads the Media Access Control (MAC) address and sends the message directly to the intended computer.
C.It reads the Layer-5 information and broadcasts the message to all the computers that are connected to the switch.
D.It reads the Media Access Control (MAC) address and broadcasts the message to all the computers that are connected to the switch.