Which two statements best describe Cisco IOS IP SLA？（）

单项选择题Whichitemisthemostimportantfactorduringdeploymentofhigh-availabilityfeatures？（）

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？（）

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？（）

A.pleting aggressive implementation schedule
B.Stateful Switchover
C.pany and user expectations
D.Nonstop Forwarding
E.change control processes
F.dual devices and dual links

多项选择题Whichtwonetworkinginfrastructurecharacteristicsaremostlikelytodistinguishvideorequirements（suchasCiscoTelePresence）fromvoicerequirements？（）

A.jitter
B.delay
C.PoE
D.bandwidth
E.packet loss

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？（）

A.allowed codecs
B.native VLAN
C.auxiliary VLAN
D.Cisco Unified Communications Manager IP address
E.RSTP