多项选择题

What are three traffic descriptors that are used by the classification process to categorize packets that require special OoS handling？（）

A.Resource Reservation Protocol （RSVP）
B.IP precedence
C.traffic shaping
D.trust boundaries
E.DSCP
F.application

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单项选择题

What management tool could be used to provide centralized configuration， monitoring， and management in a network built on Cisco wireless LAN controllers and Lightweight APs？（）

A.CiscoWorks Wireless LAN Solution Engine （WLSE）
B.CiscoWorks Wireless LAN Solution Engine （WLSE） Express
C.Cisco Wireless Control System （WCS）
D.Wireless Domain Services （WDS）
E.WLAN Controllers （WLC）

多项选择题

What are two reasons for packet loss on a VoIP connection？（）

A.serialization delay
B.overrun
C.full buffers and queues
D.propagation delay
E.shaping delay
F.TCP header errors

单项选择题

Which statement is true about the components of a queuing mechanism？（）

A.Each subinterface has its own hardware queue and can experience congestion just like its main interface
B.Hardware queuing is only used if the software queues are experiencing congestion.
C.Hardware queues and software queues are not used concurrently.
D.The hardware queuing system always uses the FIFO queuing mechanism.