单项选择题
A.Test major changes before deployment and defer minor changes until during deployment.
B.Document and verify rollback procedures.
C.Ensure consistency of code versions across the network.
D.Progressively modify procedures and documentation during implementation.
多项选择题 Whenplanninghighavailability，whichtwocomponentsareimportanttominimizetheeffectofoutages？（）
多项选择题 Whichtwoitemsaremostimportantformanagingthelong-termsuccessofhighavailability？（）
多项选择题 Whichtwonetworkinginfrastructurecharacteristicsaremostlikelytodistinguishvideorequirements（suchasCiscoTelePresence）fromvoicerequirements？（）