A.语言要素的发展变化是经常存在的
B.当社会生活发展变化时,语言要素的变化比较明显
C.一般地讲,词汇变化较语音变化明显
D.语言要素的变化并非完全受社会生活支配
第1题
第2题
第5题
第6题
第7题
A.BeforeMPLSisenabled,theipcefcommandisonlyrequitedonrouters1and4
B.AfterMPLSisenabled,theipcefcommandisonlyrequiredonrouters1and4
C.BeforeMPLSisenabled,theipcefcommandisonlyrequiredontheEthernet0interfacesofrouters1and4
D.AfterMPLSisenabled,theipcefcommandisonlyrequiredontheEthernet0interfacesofrouters1and4
E.BeforeMPLSisenabled,theipcefcommandmustbeappliedtoallproviderrouters
第8题
A.TopreventcustomersfromrunningTDPwiththeISProuters
B.TopreventcustomersfromrunningLDPwiththeISProuters
C.TopreventotherISPsfromrunningLDPwiththeISProuters
D.Topreventman-in-the-middleattacks
E.TouseCBACtoshutdownDistributedDenialofServiceattacks
F.TouseIPStoprotectagainstsession-replayattacks
G.Noneoftheabove
第9题
A.IKEkeepalivesareunidirectionalandsenteverytenseconds
B.IPsecusestheEncapsulatingSecurityProtocol(ESP)ortheAuthenticationHeader(AH)protocolforexchangingkeys
C.ToestablishIKESA,mainmodeutilizessixpacketswhileaggressivemodeutilizesonlythreepackets
D.IKEusestheDiffie-HellmanalgorithmtogeneratesymmetricalkeystobeusedbyIPsecpeers
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