单项选择题
What is one of the primary overhead fields associated with the Optical Payload Unit （OPU）？（）
A.path monitoring
B.tandem connection monitoring activation deactivation （TCM ACT）
C.Payload Structure Identifier （PSI）
D.multiframe alignment signal （MFAS）
E.section monitoring
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相关考题
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单项选择题
WhichstatementaboutMPLStrafficengineeringpolicy-basedtunnelselection（PBTS）isnottrue？（）
A.The tunnel that is not configured with the policy-class command acts as the default
B.EXP selection is between multiple tunnels to the same destination
C.There is no requirement for IGP extensions
D.Tunnels are configured using the policy-class command and carry multiple EXP values
E.It supports VRF traffic， IP-to-MPLS switching， and MPLS-to-MPLS switching -
单项选择题
WhatisthelabelforMPLSoverATM？（）
A.VPI 16
B.DLCI
C.VPI and VCI
D.circuit number
E.PVC and SVC -
单项选择题
Whenwilltheprimaryprocessorcoredumprunincaseofaswitchover？（）
A.never takes place
B.periodically
C.during switchover
D.after switchover
E.before switchover
