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

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热门试题

多项选择题WhichthreedevicesareusedbytheCiscoWirelessControlSystem（WCS）forwirelessmanagement？（）

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）

多项选择题WhichtwoCiscoAutoQoSconfigurationstatementsaretrue？（）

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

多项选择题Whenarouterconvertsanalogsignalstodigitalsignals，whatthreestepsarealwaysincludedintheprocess？（）

A.involution
B.encoding
C.sampling
D.quantization
E.compression
F.companding

多项选择题WhattwostepsneedtobetakenindeployingAutoQoSforenterpriseonrouters？（）

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

单项选择题AbranchofficeofAcmeInsurancehas15IPphonesconnectedtothemainofficeusingthedistributedcallprocessingmodel.Normally，thephonesworkwithgreatquality.However，duringverybusytimeswhenalloftheagentsareonthephoneatthesametime，thevoicequalitydropsprecipitously.Wordsorphrasesorbotharedroppedfromconversations.Whatisthemostlikelycauseoftheproblem？（）

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