单项选择题

A branch office of Acme Insurance has 15 IP phones connected to the main office using the distributed call processing model. Normally， the phones work with great quality. However， during very busy times when all of the agents are on the phone at the same time， the voice quality drops precipitously. Words or phrases or both are dropped from conversations. What is the most likely cause of the problem？（）

A.large files are being downloaded over the WAN network
B.IP phone traffic is not being classified correctly
C.more bandwidth is required for the office LAN
D.Call Admission Control has not been implemented
E.employees are watching videos over the internet
F.header compression is not being used

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多项选择题

Which two QoS statements are true about the use of the SDMQoS wizard？（）

A.business-critical traffic includes VoIP and voice signaling packets
B.SDM can be used to configure a basic QoS policy for incoming traffic on WAN interfaces andIPsec tunnels
C.SDM can provide QoS for real-time traffic and business-critical traffic
D.SDM creates a custom-queuing （CQ） or a priority-queuing （PQ） policy
E.SDM creates a low latency queuing （LLQ） service policy with its associated classes
F.when allocating bandwidth， values can be entered in either bandwidth percentage or kilobytes per second （kBps）

多项选择题

Which two features are supported by the WLAN Solution Engine （WLSE）？（）

A.configuration of APs
B.auto discovery of rogue APs
C.reporting
D.WLSE in two versions： base and location
E.graphical view of multiple controllers and managed APs

多项选择题

Which three traffic descriptors are typically used as QoS markings for packets or frames entering the network？（）

A.protocol type
B.CoS
C.DSCP
D.IP precedence
E.destination address
F.input interface