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


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2.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.

3.多項(xiàng)選擇題Which two Internet Protocol (IP) telephony devices are best categorized as infrastructure components? ()

A.IP telephones
B.Voice gateways
C.Call management software
D.Media Convergence Servers (MCSs)

4.單項(xiàng)選擇題What ensures that voice packets are given priority throughout the network so that conversations arrive intact?()

A.QoS
B.Centrex
C.Packet encryption
D.Intelligent call routing

5.單項(xiàng)選擇題Why is QoS important in a converged network?()

A.Because data does not need to arrive intact, so data transfer rates can be variable
B.Because lost voice-data packets must be retransmitted
C.Because voice data packets should arrive quickly and sequentially, and with no lost data
D.Because voice data packets must follow a single dedicated path through the network

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