单项选择题The Acme company has determined that during its busiest hours, the average number of internal VoIP calls across the WAN link is four (4). Since this is an average, the WAN link has been sized for six (6) calls with no call admission control. What will happen when a seventh call is attempted across the WAN link? ()

A.the seventh call is routed via the PSTN
B.the call is denied and the original six (6) calls remain
C.the call is completed and the first call is dropped
D.the call is completed, but all calls have quality issues
E.the call is completed but the seventh call has quality issues


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1.单项选择题When calls are denied by call admission control (CAC), the calls are rerouted through the PSTN via the use of which Cisco CallManager feature?()

A.automated alternate routing (AAR)
B.Cisco CallManager Attendant Console
C.real-time protocol (RTP)
D.Survivable Remote Site Telephony (SRST)

2.多项选择题Which two statements about the QoS functionality of the Cisco SDM are true?()

A.the first step when using the SDM QoS wizard is to select the inbound interface on which the QoS policy must be applied
B.the SDM QoS wizard can be used to optimize LAN, WAN, and VPN interfaces
C.he SDM QoS wizard supports network-based application recognition (NBAR) to provide deep and stateful packet inspection
D.he SDM QoS wizard will apply custom queuing and priority queuing policies to the identified interfaces
E.he SDM QoS wizard will apply low latency-queuing,custom-queuing and priority-queuing policies to the identified interfaces
F.to create and manage the QoS settings, the user must select the QoS wizard task under the Monitor option

3.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

4.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

5.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

6.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)

7.多项选择题Which two Cisco AutoQoS configuration statements are true? ()

A.the auto discovery qos command is supported on serial interfaces, subinterfaces, and virtual interfaces
B.CEF must be enabled before configuring the auto discovery qos command
C.the auto discovery qos privilege EXEC command must be configured on a router for several days to collect a sampling of data traffic
D.the auto qos trust command relies on NBAR to provide VoIP classification
E.the auto qos voip command configures the voip classification on routers and switches

9.多项选择题What two steps need to be taken in deploying AutoQoS for enterprise on routers?()

A.provide visibility into the classes of service deployed using system logging and SNMP traps
B.determine WAN settings for fragmentation, compression, encapsulation, and Frame Relay-ATM interworking
C.enable the AutoQoS VoIP for voice traffic
D.generate and deploy MQC-based QoS policies
E.profile the traffic with Auto-Discovery

10.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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When Cisco SDM is used to generate QoS policy, various QoS classes will be created and assigned a percentage of the interface bandwidth. Which three statements indicate the default bandwidth values that are assigned by SDM for outgoing traffic on a WAN interface? ()

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Within the WMM policy, how many default QoS radio access categories are there?()

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Which three functions can an Integrated Services Router perform in a VoIP network?()

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