单项选择题
What does most service requests coming to Cisco TAC concern？（）
A. equipment defects
B. equipment failures
C. complex network operation and management issues
D. integrating mixed vendor equipment
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WhatisoneofthemostimportantwaysinwhichCisconetworkintegrationcanprovidegreatopportunityinthehealthcaremarket？（）
A. converging voice， video， and data onto one network
B. using IT services to improve revenue
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WhatisneededtoallowITmanagerstodesign，control，andmonitortheirwirelessnetworksformacentralizedlocationaswirelessnetworksgrowinscaleandcomplexity？（）
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WhataretwoadvantagesthattheCisco3900SeriesIntegratedServicesRoutershaveovertherestoftheintegratedservicesrouters？（）
A. Telepresence-capable
B. high-density service virtualization
C. intelligent integration of security
D. wireless services
E. unified communications
