單項選擇題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


您可能感興趣的試卷

你可能感興趣的試題

1.單項選擇題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

3.單項選擇題Which network technology addresses these customer business needs: shrinking budgets and IT staffs, more complex networks, and an increased need for network security?（）

A.Optical network
B.Network management
C.Storage-area network (SAN)
D.Content delivery network (CDN)

4.單項選擇題What does a router do?（）

A.Stores data on the network and connects the local-area network (LAN) to the wide-area network (WAN)
B.Routes traffic down alternative paths and connects the local-area network (LAN) to the wide- area network (WAN)
C.Broadcasts data to all devices that are connected to it across the local-area network (LAN) and wide-area network (WAN)
D.Reads Media Access Control (MAC) addresses to forward messages to the correct location and connects the local-area network (LAN) to the wide-area network (WAN)

5.單項選擇題Which component should you use to reduce collision issues on a large LAN?（）

A.Host
B.Switch
C.Printer
D.Repeater