单项选择题

Which IOS feature provides dial plan scalability and bandwidth management for H.323 VoIP implementations？（）

A.gatekeeper
B.Call Routing
C.Call Admission Control
D.Digital Signal Processors

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多项选择题

Which three pieces of information are used to calculate the total bandwidth of a VoIP call？（）

A.the packetization size
B.the serialization of the interface
C.the quantization
D.the packet rate
E.the UDP overhead
F.the TCP overhead

多项选择题

What are two characteristics of the DiffServ model？（）

A.service guarantee
B.traffic that is divided into classes
C.not scalable to large implementations
D.QoS mechanisms that are used without prior signaling
E.applications that signal their particular QoS and bandwidth requirements

多项选择题

Which three devices are used by the Cisco Wireless Control System （WCS） for wireless management？（）

A.WLAN controllers
B.WLAN Solution Engine （WLSE）
C.Cisco Wireless Control System （WCS）
D.Cisco Wireless Location Appliance
E.lightweight access point （AP）
F.autonomous access point （AP）