Which two models are the models of DiffServ-Aware Traffic Engineering？ （）

多项选择题WhichthreeareoptionalextensionsoftheFrameRelayLocalManagementInterfacespecification？（）

A.switched virtual circuit
B.virtual circuit status
C.simple flow control
D.multicasting
E.permanent virtual circuit

多项选择题IntheCarrierSupportCarrier（CsC）feature，whichtwoprotocolsrunCSC-PEandCSC-CS？（）

A.EBGPv4 with a sending community
B.IGP and LDP
C.EBGPv4 with a sending label
D.IGP and EBGPv4
E.IGP and RSVP

单项选择题WhichstatementaboutstandardSTS-1SONETframingistrue？（）

A.8 rows by 64 bytes
B.6 rows by 64 bytes
C.10 rows by 96 bytes
D.8 rows by 128 bytes
E.9 rows by 90 bytes

单项选择题WhatisthedefaultBGPscannertime？（）

A.10 minutes
B.5 minutes
C.120 seconds
D.60 seconds
E.30 minutes

单项选择题Youareabouttodesignaveryfastconvergencetimeonaserviceprovidernetwork.Whichfeaturewouldyouutilizetodeclarealinkfailurewithinlessthantwosecondsofthefaultonalink？（）

A.fast convergence SFP
B.MTU discovery
C.redundancy links
D.keepalive
E.carrier delay