题目内容:
回答题:Foreachblank,choosethebestanswerfromthefourchoicesandwritedownontheanswersheet. __(66)__isaprotocolthatahostusestoinformarouterwhenitjoinsOrleavesanInternetmulticastgroup.
__(67)__isanerrordetectioncodethatmostdatacommunicationnetworksuse.
__(68)__isaninteriorgatewayprotocolthatusesadistancevectoralgorithmtopropagateroutinginformation.
__(69)__isatransfermodeinwhichalltypesofinformationareorganizedintofixedformcellsonanasynchronousornon-periodicbasisoverarangeofmedia.
__(70)__isanidentifierofawebpage.(66) A.ICMP
B.SMTP
C.IGMP
D.ARP
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答案解析: