Whichstepcanbeusedtotrapruntimescripterrorsandrecovergracefully？（）
A. Set
B. CallSubflow
C. OnExceptionGoto
D. GetReportingStatistic
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Whataretwocharacteristicsofdual-ringinterconnectinSDHnetworks？（）
A. Itprotectssignalsagainstnodefailuresbetweenrings.
B. Itprotectssignalsagainstnodefailurewithinasinglering.
C. Itallowsfortraffictobepreemptedwhenaringswitchoccurs.
D. Trafficcanbedroppedandcontinuedatinterconnectingnodes.
E. Itprotectspreemptibletrafficfrombeingdroppedwhenaringswitchoccurs.
WhichtwoofthefollowingarevalidCRSdeploymentscenarios？（）
A. IPCCExpresscommunicatingwiththeICMviaastandaloneIPCCGatewayPGrunningonanexpansionserver
B. IPCCExpresscommunicatingwiththeICMviaaco-residentIPCCGatewayPG
C. IPCCExpressusingtheIPCCEnterpriseOutboundoption
D. IPCCExpressusingtheIPCCEnterpriseCTI-OSToolkit
E. IPIVRintegratingwithIPCCEnterprisetofunctionasqueuepointandself-serviceplatform
Whatisthephenomenoncalledwheredifferentwavelengthsoflighttravelatdifferentspeeds？（）
A. OSNR
B. dispersion
C. lightskew
D. attenuation
重复使用的围裙，每班使用后应及时清洗消毒。遇有破损或渗透时，应及时更换。（)
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