Which two options are valid WAN connectivity methods?()
A. PPP
B. WAP
C. DSL
D. Ethernet
E. L2TPv3
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如果样品含有较多的有机物质和悬浮物,要测定总量银,水样应在现场加硝酸酸化,使PH<2.带回实验室后,在分取试液前,应充分摇匀水样,立即分取适量含有悬浮物的混合水样于100ml烧杯中,加()消解,并蒸发至冒浓厚白烟将尽。
A. HNO3-HCIO4-H2O2
B. HNO3-HCIO4-HCI-H2O2
C. HNO3+H2SO4-H2O2
D. HNO3-HF-H2O2
WhichstatementaboutMPLStrafficengineeringpolicy-basedtunnelselection(PBTS)isnottrue?()
A. Thetunnelthatisnotconfiguredwiththepolicy-classcommandactsasthedefault
B. EXPselectionisbetweenmultipletunnelstothesamedestination
C. ThereisnorequirementforIGPextensions
D. Tunnelsareconfiguredusingthepolicy-classcommandandcarrymultipleEXPvalues
E. ItsupportsVRFtraffic,IP-to-MPLSswitching,andMPLS-to-MPLSswitching
Whatarethemandatory,well-knownBGPattributes?()
A. origin,AS-path,next-hop
B. AS-path,origin,MED
C. AS-path,origin,weight
D. AS-path,weight,MED
WhatisoneoftheprimaryoverheadfieldsassociatedwiththeOpticalPayloadUnit(OPU)?()
A. pathmonitoring
B. tandemconnectionmonitoringactivationdeactivation(TCMACT)
C. PayloadStructureIdentifier(PSI)
D. multiframealignmentsignal(MFAS)
E. sectionmonitoring