Whataretwocharacteristicsofdual-ringinterconnectinSDHnetworks？（）
A. Itprotectssignalsagainstnodefailuresbetweenrings.
B. Itprotectssignalsagainstnodefailurewithinasinglering.
C. Itallowsfortraffictobepreemptedwhenaringswitchoccurs.
D. Trafficcanbedroppedandcontinuedatinterconnectingnodes.
E. Itprotectspreemptibletrafficfrombeingdroppedwhenaringswitchoccurs.
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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。（)
Whichinterfaceisusedtoconfiguredebugparametersforlogfiles？（）
A. DatastoreControlCenter
B. AlarmandTraceConfiguration
CustomFileConfiguration
D. ControlCenter
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