多项选择题
When planning high availability， which two components are important to minimize the effect of outages？（）
A.work staff attributes， such as skills and communication
B.redundancy， to prevent single points of failure
C.processes， such as documentation， change control， and labs
D.appropriate technology， such as hardware and software
E.tools， such as those for monitoring and reporting
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Whichtwoitemsaremostimportantformanagingthelong-termsuccessofhighavailability？（）
A.pleting aggressive implementation schedule
B.Stateful Switchover
C.pany and user expectations
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Whichtwonetworkinginfrastructurecharacteristicsaremostlikelytodistinguishvideorequirements（suchasCiscoTelePresence）fromvoicerequirements？（）
A.jitter
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During voice implementation， which two required items are configured at an access layer switch connected to an IP phone to provide VoIP communication？（）
A.allowed codecs
B.native VLAN
C.auxiliary VLAN
D.Cisco Unified Communications Manager IP address
E.RSTP
