多项选择题
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
多项选择题 Whichtwoitemsaremostimportantformanagingthelong-termsuccessofhighavailability？（）
多项选择题 Whichtwonetworkinginfrastructurecharacteristicsaremostlikelytodistinguishvideorequirements（suchasCiscoTelePresence）fromvoicerequirements？（）
多项选择题 During voice implementation， which two required items are configured at an access layer switch connected to an IP phone to provide VoIP communication？（）